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.
[[-124, -174, -30, -67], [44, -156, -76, 68, -145, -19, -178], [-18, -104, -19, -63, -15], [-99, 12, -129, 38, 4]]