How is Juror Three finally convinced to change his vote from "not guilty"?

In Act III, the vote is 11 to 1, and 3rd Juror stands alone. At first, he stands firm, saying that he will be the holdout to make this a hung jury. He launches himself into a final massive rant against the boy that descends into nonsense. 8th and 4th Jurors make a short final plea, and 3rd Juror finally concedes, saying “All right. Not guilty.”

THREE (pleading). Listen. What’s the matter with you? You’re the guy. You made all the arguments. You can’t turn now. A guilty man’s gonna be walking the streets. A murderer. He’s got to die! Stay with me.

FOUR. I’m sorry. There’s a reasonable doubt in my mind.EIGHT. We’re waiting.(THREE turns violently on him.)

THREE (shouting). Well, you’re not going to intimidate me! (They all look at THREE.) I’m entitled to my opinion! (No one answers him.) It’s gonna be a hung jury! That’s it!

EIGHT. There’s nothing we can do about that, except hope that some night, maybe in a few months, you’ll get some sleep.FIVE. You’re all alone.

NINE. It takes a great deal of courage to stand alone.

(THREE looks around at all of them for a long time. They sit silently, waiting for him to speak, and all of them despise him for his stubbornness. Then, suddenly, his face contorts as if he is about to cry, and he slams his fist down on the table.)

THREE (thundering). All right!