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==Background==​

==Background==​

Prosser was born in [[Cheyenne]] to Dean Prosser, Sr. (1888-1958), and the former Dorothy Riner (1889–1973) and spent his early years on the family ranch in Albany County near Laramie. He attended the first six grades at the former Pumpkin Vine  School in Tie Siding, located north of the [[Colorado]] border. He then attended University Prep School and lived at Sherwood Hall in Laramie. In 1934, he graduated from Cheyenne Central High School. Thereafter in 1939, he procured a Bachelor of Science degree in [[business administration]] from the [[University of Colorado]] at Boulder.<ref name=obit/> ​

Prosser was born in [[Cheyenne]] to Dean Prosser, Sr. (1888-1958), and the former Dorothy Riner (1889–1973) and spent his early years on the family ranch in Albany County near Laramie. He attended the first six grades at the former Pumpkin Vine  School in Tie Siding, located north of the [[Colorado]] border. He then attended University Prep School and lived at Sherwood Hall in Laramie. In 1934, he graduated from Cheyenne Central High School. Thereafter in 1939, he procured a Bachelor of Science degree in business administration from the [[University of Colorado]] at Boulder.<ref name=obit/> ​

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In 1940, he wed the former Harriot Ann McSween. They settled on the Chalk Bluffs Ranch near Cheyenne, where Prosser assisted his father in the ranching operation. Prosser took over the management of the ranch after his father's death in 1958 and ranched in Cheyenne until 1963, when he joined the stockgrowers association.​<ref name=obit/>

In 1940, he wed the former Harriot Ann McSween. They settled on the Chalk Bluffs Ranch near Cheyenne, where Prosser assisted his father in the ranching operation. Prosser took over the management of the ranch after his father's death in 1958 and ranched in Cheyenne until 1963, when he joined the stockgrowers association.​<ref name=obit/>