Finding the Fourth Proportional to 91,151.62, 136,530.59 and 88,920.88

Step by Step Solution

1. Step 1: Write the proportion equation
   91,151.62 : 136,530.59 = 88,920.88 : x
2. Step 2: Convert to fraction form
   91,151.62/136,530.59 = 88,920.88/x
3. Step 3: Cross multiply
   91,151.62x = 136,530.59 × 88,920.88
4. Step 4: Simplify right side
   91,151.62x = 12,140,420,090.69
5. Step 5: Solve for x
   x = 12,140,420,090.69/91,151.62
6. Step 6: Final answer
   x = 133,189.30