Some schools require academic reference for grad school admission?

[cjl2190]

So I am feeling awkward about my letters of recommendation. I have 2 solid recommendation letters, but some schools ask for a third from an academic source, like a professor. First of all, my entire undergraduate was online (Bachelor's in Business Admin.) so i never had a connection at all with any professor. Also, the field of study I am going into is completely different than business. Do I just skip out on the academic reference and try to find another or do I awkwardly ask a professor that I don't know but took their class... so weird and uncomfortable. What do you think?