Finding the Fourth Proportional to 257,301.46, 385,978.38 and 88,799.86

Step by Step Solution

1. Step 1: Write the proportion equation
   257,301.46 : 385,978.38 = 88,799.86 : x
2. Step 2: Convert to fraction form
   257,301.46/385,978.38 = 88,799.86/x
3. Step 3: Cross multiply
   257,301.46x = 385,978.38 × 88,799.86
4. Step 4: Simplify right side
   257,301.46x = 34,274,826,107.03
5. Step 5: Solve for x
   x = 34,274,826,107.03/257,301.46
6. Step 6: Final answer
   x = 133,208.83