Drain pineapple, resrving 1/4 cup juice in a saucepan; set pineapple aside. Add brown sugar and orange peel to the juice; heat until sugar dissolves. Peel and section oranges into a large bowl, reserving any juice; add the apples and pienapple. Add pineapple juice mixture and stir gently. Chill. Just before serving, sprinkle with coconut.