 He won a bronze medal in the C-2 1000 m event at the 2006 ICF Canoe Sprint World Championships in Szeged.Competing in two Summer Olympics also for Ukraine, Prokopenko earned his best finish of eighth in the C-2 500 m event at Beijing in 2008.Prokopenko moved to Azerbaijan after the 2008 Summer Olympics and won two medals for his new nation at the 2009 ICF Canoe Sprint World Championships in Dartmouth, Nova Scotia with a silver in the C-2 1000 m and a bronze in the C-2 500 m events.