If it's bad, will it smell first? Here's a few pics.If it did not look like the other 2 then I would say that you have a quitter. Keep an eye on that one. Maybe candle again in 2 days. If no different I would toss it. You don't want a bad egg to explode in the bator and ruin the rest of your hatch.
Here's one of my other good eggs. I know it's alive, I saw it moving.