Finding the Fourth Proportional to 258,284.48, 387,404.85 and 89,761.55

Step by Step Solution

1. Step 1: Write the proportion equation
   258,284.48 : 387,404.85 = 89,761.55 : x
2. Step 2: Convert to fraction form
   258,284.48/387,404.85 = 89,761.55/x
3. Step 3: Cross multiply
   258,284.48x = 387,404.85 × 89,761.55
4. Step 4: Simplify right side
   258,284.48x = 34,774,059,813.52
5. Step 5: Solve for x
   x = 34,774,059,813.52/258,284.48
6. Step 6: Final answer
   x = 134,634.72