Final cut pro x - how to export an mp4 video with 192kbps audio quaity

I need to export a video file at 1920x720 in mp4 format and the audio line must be at 192kbps.

when i try that on fcpx, using h.264 codec, it automatically uses AAC at 48kbps…the only way I found to get the setting I need was using one of Apple’s compression codec but then they are not compatible with browser nor windows machines (even if played on quicktime for windows). In my mac it plays perfectly but everywhere else it plays just the sound, video is black. Is there another way to set the file to be exported with the characteristics I need?