Finding the Fourth Proportional to 256,929.86, 385,298.94 and 88,402.52

Step by Step Solution

1. Step 1: Write the proportion equation
   256,929.86 : 385,298.94 = 88,402.52 : x
2. Step 2: Convert to fraction form
   256,929.86/385,298.94 = 88,402.52/x
3. Step 3: Cross multiply
   256,929.86x = 385,298.94 × 88,402.52
4. Step 4: Simplify right side
   256,929.86x = 34,061,397,249.33
5. Step 5: Solve for x
   x = 34,061,397,249.33/256,929.86
6. Step 6: Final answer
   x = 132,570.80