The network numbers are total weekly views, the cable numbers are total daily numbers. Multiply Fox’s numbers by 7 then compare.
By 7 or 5? Do they count weekends?
“But to put the numbers in perspective, the study points out that four times as many people watch the three network evening newscasts than watch the three cable news channels in primetime, and that twice as many people watch the lowest-rated broadcast evening newscast than the highest-rated cable news program.”
http://www.multichannel.com/article/465234-Cable_Network_News_See_Audience_Declines_In_2010_PEJ.php