Finding the Fourth Proportional to 111.02, 153.17 and 86.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111.02 : 153.17 = 86.52 : x
2. Step 2: Convert to fraction form
   111.02/153.17 = 86.52/x
3. Step 3: Cross multiply
   111.02x = 153.17 × 86.52
4. Step 4: Simplify right side
   111.02x = 13,251.63
5. Step 5: Solve for x
   x = 13,251.63/111.02
6. Step 6: Final answer
   x = 119.36