Finding the Third Proportional to 4,823,320 and 7,677,780

Step by Step Solution

1. Step 1: Write the proportion equation
   4,823,320 : 7,677,780 = 7,677,780 : x
2. Step 2: Convert to fraction form
   4,823,320/7,677,780 = 7,677,780/x
3. Step 3: Cross multiply
   4,823,320x = 7,677,780 × 7,677,780
4. Step 4: Simplify right side
   4,823,320x = 58,948,305,728,400
5. Step 5: Solve for x
   x = 58,948,305,728,400/4,823,320
6. Step 6: Final answer
   x = 12,221,520.80