Finding the Fourth Proportional to 172,633.20, 258,561 and 88,419.12

Step by Step Solution

1. Step 1: Write the proportion equation
   172,633.20 : 258,561 = 88,419.12 : x
2. Step 2: Convert to fraction form
   172,633.20/258,561 = 88,419.12/x
3. Step 3: Cross multiply
   172,633.20x = 258,561 × 88,419.12
4. Step 4: Simplify right side
   172,633.20x = 22,861,736,086.32
5. Step 5: Solve for x
   x = 22,861,736,086.32/172,633.20
6. Step 6: Final answer
   x = 132,429.54