Finding the Fourth Proportional to 931,171.37, 1,397,224.49 and 425,687.31

Step by Step Solution

1. Step 1: Write the proportion equation
   931,171.37 : 1,397,224.49 = 425,687.31 : x
2. Step 2: Convert to fraction form
   931,171.37/1,397,224.49 = 425,687.31/x
3. Step 3: Cross multiply
   931,171.37x = 1,397,224.49 × 425,687.31
4. Step 4: Simplify right side
   931,171.37x = 594,780,732,485.79
5. Step 5: Solve for x
   x = 594,780,732,485.79/931,171.37
6. Step 6: Final answer
   x = 638,744.66