Finding the Fourth Proportional to 256,939.92, 385,146.72 and 88,409.52

Step by Step Solution

1. Step 1: Write the proportion equation
   256,939.92 : 385,146.72 = 88,409.52 : x
2. Step 2: Convert to fraction form
   256,939.92/385,146.72 = 88,409.52/x
3. Step 3: Cross multiply
   256,939.92x = 385,146.72 × 88,409.52
4. Step 4: Simplify right side
   256,939.92x = 34,050,636,644.77
5. Step 5: Solve for x
   x = 34,050,636,644.77/256,939.92
6. Step 6: Final answer
   x = 132,523.73