Finding the Third Proportional to 309,882.38 and 478,836

Step by Step Solution

1. Step 1: Write the proportion equation
   309,882.38 : 478,836 = 478,836 : x
2. Step 2: Convert to fraction form
   309,882.38/478,836 = 478,836/x
3. Step 3: Cross multiply
   309,882.38x = 478,836 × 478,836
4. Step 4: Simplify right side
   309,882.38x = 229,283,914,896
5. Step 5: Solve for x
   x = 229,283,914,896/309,882.38
6. Step 6: Final answer
   x = 739,906.28