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.
[[-172, 10, -200, -78], [-92, -140, 2, -135, 75, -30, 21], [92, -8, -38]]