Finding the Third Proportional to 415,084.50 and 626,439

Step by Step Solution

1. Step 1: Write the proportion equation
   415,084.50 : 626,439 = 626,439 : x
2. Step 2: Convert to fraction form
   415,084.50/626,439 = 626,439/x
3. Step 3: Cross multiply
   415,084.50x = 626,439 × 626,439
4. Step 4: Simplify right side
   415,084.50x = 392,425,820,721
5. Step 5: Solve for x
   x = 392,425,820,721/415,084.50
6. Step 6: Final answer
   x = 945,411.89