Finding the Third Proportional to 386,653.50 and 847,665

Step by Step Solution

1. Step 1: Write the proportion equation
   386,653.50 : 847,665 = 847,665 : x
2. Step 2: Convert to fraction form
   386,653.50/847,665 = 847,665/x
3. Step 3: Cross multiply
   386,653.50x = 847,665 × 847,665
4. Step 4: Simplify right side
   386,653.50x = 718,535,952,225
5. Step 5: Solve for x
   x = 718,535,952,225/386,653.50
6. Step 6: Final answer
   x = 1,858,345.91