Finding the Fourth Proportional to 100.15, 149.83 and 88.61

Step by Step Solution

1. Step 1: Write the proportion equation
   100.15 : 149.83 = 88.61 : x
2. Step 2: Convert to fraction form
   100.15/149.83 = 88.61/x
3. Step 3: Cross multiply
   100.15x = 149.83 × 88.61
4. Step 4: Simplify right side
   100.15x = 13,275.96
5. Step 5: Solve for x
   x = 13,275.96/100.15
6. Step 6: Final answer
   x = 132.56