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.
[[-5, -88, 65], [-123, -134, -115, -147, -97, 36, -4], [-169, 79, -110, -185, -177], [-115, -118, 78, -132, 21, 78, -20]]