Round 4,76,83,519 to the nearest thousand, lakh, and crore.

The thousands digit is 3. The digit to its right is 5. Since 5 is 5 or greater, we round up the thousands digit and change all digits to its right to zero.
$4,76,83,519 \approx 4,76,84,000$

The lakhs digit is 6. The digit to its right is 8. Since 8 is 5 or greater, we round up the lakhs digit and change all digits to its right to zero.
$4,76,83,519 \approx 4,77,00,000$

The crores digit is 4. The digit to its right is 7. Since 7 is 5 or greater, we round up the crores digit and change all digits to its right to zero.
$4,76,83,519 \approx 5,00,00,000$

The rounded numbers are:

(i) Nearest thousand: $\boxed{\text{4,76,84,000}}$

(ii) Nearest lakh: $\boxed{\text{4,77,00,000}}$

(iii) Nearest crore: $\boxed{\text{5,00,00,000}}$