Finding the Fourth Proportional to 111.37, 153.51 and 88.01

Step by Step Solution

1. Step 1: Write the proportion equation
   111.37 : 153.51 = 88.01 : x
2. Step 2: Convert to fraction form
   111.37/153.51 = 88.01/x
3. Step 3: Cross multiply
   111.37x = 153.51 × 88.01
4. Step 4: Simplify right side
   111.37x = 13,510.42
5. Step 5: Solve for x
   x = 13,510.42/111.37
6. Step 6: Final answer
   x = 121.31