Former Chancellor Porter L. Fortune Jr., 69, who guided the University of Mississippi through the post-integration period. State political leaders and educators credited Fortune with pulling the school from the shadow of the violent resistance to the enrollment of the school's first black, James Meredith, in 1962. Fortune became the 21st chief executive of Ole Miss in January, 1968, at the age of 48. He retired as chancellor in 1984. In Oxford, Miss. on Thursday of heart complications.