Finding the Fourth Proportional to 437,870.56, 656,894.80 and 138,397.92

Step by Step Solution

1. Step 1: Write the proportion equation
   437,870.56 : 656,894.80 = 138,397.92 : x
2. Step 2: Convert to fraction form
   437,870.56/656,894.80 = 138,397.92/x
3. Step 3: Cross multiply
   437,870.56x = 656,894.80 × 138,397.92
4. Step 4: Simplify right side
   437,870.56x = 90,912,873,978.82
5. Step 5: Solve for x
   x = 90,912,873,978.82/437,870.56
6. Step 6: Final answer
   x = 207,625.00