Finding the Third Proportional to 3,816,909 and 8,231,645

Step by Step Solution

1. Step 1: Write the proportion equation
   3,816,909 : 8,231,645 = 8,231,645 : x
2. Step 2: Convert to fraction form
   3,816,909/8,231,645 = 8,231,645/x
3. Step 3: Cross multiply
   3,816,909x = 8,231,645 × 8,231,645
4. Step 4: Simplify right side
   3,816,909x = 67,759,979,406,025
5. Step 5: Solve for x
   x = 67,759,979,406,025/3,816,909
6. Step 6: Final answer
   x = 17,752,579.22