Finding the Fourth Proportional to 256,930.86, 385,300.44 and 88,403.52

Step by Step Solution

1. Step 1: Write the proportion equation
   256,930.86 : 385,300.44 = 88,403.52 : x
2. Step 2: Convert to fraction form
   256,930.86/385,300.44 = 88,403.52/x
3. Step 3: Cross multiply
   256,930.86x = 385,300.44 × 88,403.52
4. Step 4: Simplify right side
   256,930.86x = 34,061,915,153.55
5. Step 5: Solve for x
   x = 34,061,915,153.55/256,930.86
6. Step 6: Final answer
   x = 132,572.30