Finding the Fourth Proportional to 258,003.72, 386,976.24 and 89,492.88

Step by Step Solution

1. Step 1: Write the proportion equation
   258,003.72 : 386,976.24 = 89,492.88 : x
2. Step 2: Convert to fraction form
   258,003.72/386,976.24 = 89,492.88/x
3. Step 3: Cross multiply
   258,003.72x = 386,976.24 × 89,492.88
4. Step 4: Simplify right side
   258,003.72x = 34,631,618,209.17
5. Step 5: Solve for x
   x = 34,631,618,209.17/258,003.72
6. Step 6: Final answer
   x = 134,229.14