"Enchanté" is the most common and polite way to say "Nice to meet you" in French, especially for formal introductions.
Here's how you would use it:
* For a man: "Enchanté de vous rencontrer" (Formal) or "Enchanté" (Informal)
* For a woman: "Enchantée de vous rencontrer" (Formal) or "Enchantée" (Informal)
Let me know if you have any other French phrases you'd like help with!