Finding the Fourth Proportional to 99.32, 136.88 and 88.01

Step by Step Solution

1. Step 1: Write the proportion equation
   99.32 : 136.88 = 88.01 : x
2. Step 2: Convert to fraction form
   99.32/136.88 = 88.01/x
3. Step 3: Cross multiply
   99.32x = 136.88 × 88.01
4. Step 4: Simplify right side
   99.32x = 12,046.34
5. Step 5: Solve for x
   x = 12,046.34/99.32
6. Step 6: Final answer
   x = 121.29