Finding the Third Proportional to 3,816,920 and 8,231,665

Step by Step Solution

1. Step 1: Write the proportion equation
   3,816,920 : 8,231,665 = 8,231,665 : x
2. Step 2: Convert to fraction form
   3,816,920/8,231,665 = 8,231,665/x
3. Step 3: Cross multiply
   3,816,920x = 8,231,665 × 8,231,665
4. Step 4: Simplify right side
   3,816,920x = 67,760,308,672,225
5. Step 5: Solve for x
   x = 67,760,308,672,225/3,816,920
6. Step 6: Final answer
   x = 17,752,614.33