Finding the Fourth Proportional to 257,410.86, 386,167.72 and 88,937.34

Step by Step Solution

1. Step 1: Write the proportion equation
   257,410.86 : 386,167.72 = 88,937.34 : x
2. Step 2: Convert to fraction form
   257,410.86/386,167.72 = 88,937.34/x
3. Step 3: Cross multiply
   257,410.86x = 386,167.72 × 88,937.34
4. Step 4: Simplify right side
   257,410.86x = 34,344,729,810.66
5. Step 5: Solve for x
   x = 34,344,729,810.66/257,410.86
6. Step 6: Final answer
   x = 133,423.78