Finding the Fourth Proportional to 111.32, 153.58 and 88.01

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 153.58 = 88.01 : x
2. Step 2: Convert to fraction form
   111.32/153.58 = 88.01/x
3. Step 3: Cross multiply
   111.32x = 153.58 × 88.01
4. Step 4: Simplify right side
   111.32x = 13,515.37
5. Step 5: Solve for x
   x = 13,515.37/111.32
6. Step 6: Final answer
   x = 121.42