Born on July 29, 1909, in Throop, Pennsylvania, a community in Lackawanna County, Prokop attended Villanova University in Philadelphia.
At the beginning of World War II, he enlisted in the United States Army as a private, and was assigned to the 30th Infantry Division.
Post-war, he served on the North Pococno Joint Board of Education for ten years, and was then elected to the United States Congress in 1958, defeating incumbent Republican Congressman Joseph L. Carrigg.
A one-term member, Prokop was defeated for re-election in 1960 by future Pennsylvania governor William Scranton, a moderate Republican.
Prokop moved to Lake Ariel, Pennsylvania, during his county government tenure, and remained in that job until his death on Veterans Day in 1977.