Rick Harrison is officially an engaged man for the fourth time.During an appearance on "In Depth with Graham Bensinger," the "Pawn Stars" personality discussed his recent engagement and his previous marriages, telling host Graham Bensinger, each time he got married he "thought it was forever," but that he is happy right now."Yes, I have been married three times and I just proposed again and I am happy… Everybody gets wrapped up in the stupid s---," he said on the show. "They start arguing about stuff… Maybe fourth time's a charm."Harrison addressed the fact that he didn't sign a prenup before