Finding the Third Proportional to 253,574.50 and 394,902

Step by Step Solution

1. Step 1: Write the proportion equation
   253,574.50 : 394,902 = 394,902 : x
2. Step 2: Convert to fraction form
   253,574.50/394,902 = 394,902/x
3. Step 3: Cross multiply
   253,574.50x = 394,902 × 394,902
4. Step 4: Simplify right side
   253,574.50x = 155,947,589,604
5. Step 5: Solve for x
   x = 155,947,589,604/253,574.50
6. Step 6: Final answer
   x = 614,997.13