In this task, you are given a list. This list contains many lists of integers. The list is several items written within a []. Your task is to find the maximum number among the members of each inner list. The output should be a list comprised of the maximums with the same order as the internal lists.
[[-21, -147, -192, -96], [55, 94, -72, -144], [-15, -178, 2], [55, -10, -20, 76], [12, -90, -22, -13, -148], [-138, -171], [24, -68, -103, -184]]