Finding the Fourth Proportional to 91,150.74, 136,529.28 and 88,920

Step by Step Solution

1. Step 1: Write the proportion equation
   91,150.74 : 136,529.28 = 88,920 : x
2. Step 2: Convert to fraction form
   91,150.74/136,529.28 = 88,920/x
3. Step 3: Cross multiply
   91,150.74x = 136,529.28 × 88,920
4. Step 4: Simplify right side
   91,150.74x = 12,140,183,577.60
5. Step 5: Solve for x
   x = 12,140,183,577.60/91,150.74
6. Step 6: Final answer
   x = 133,187.99