Fortuné started his professional career at Angoulême in 1998, switching to Lille in 2002. He spent the 2003–04 season on loan to Rouen and switched permanently to Brest in July 2004. A year later he moved to Dutch club Utrecht. He joined AS Nancy in January 2007, also spending a six-month loan spell at West Bromwich Albion from January 2009 until the end of the 2009–10 season. Fortuné signed for Celtic in July 2009 before returning to West Brom in August 2010, this time on a permanent deal. He later played for Doncaster Rovers, Wigan Athletic, Coventry City, Southend United and Chesterfield