Finding the Third Proportional to 331,831.69 and 499,387.78

Step by Step Solution

1. Step 1: Write the proportion equation
   331,831.69 : 499,387.78 = 499,387.78 : x
2. Step 2: Convert to fraction form
   331,831.69/499,387.78 = 499,387.78/x
3. Step 3: Cross multiply
   331,831.69x = 499,387.78 × 499,387.78
4. Step 4: Simplify right side
   331,831.69x = 249,388,156,061.80
5. Step 5: Solve for x
   x = 249,388,156,061.80/331,831.69
6. Step 6: Final answer
   x = 751,550.15