Finding the Fourth Proportional to 91,151.24, 136,530.03 and 88,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,151.24 : 136,530.03 = 88,920.50 : x
2. Step 2: Convert to fraction form
   91,151.24/136,530.03 = 88,920.50/x
3. Step 3: Cross multiply
   91,151.24x = 136,530.03 × 88,920.50
4. Step 4: Simplify right side
   91,151.24x = 12,140,318,873.94
5. Step 5: Solve for x
   x = 12,140,318,873.94/91,151.24
6. Step 6: Final answer
   x = 133,188.74