Finding the Fourth Proportional to 111.55, 153.92 and 62.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.55 : 153.92 = 62.42 : x
2. Step 2: Convert to fraction form
   111.55/153.92 = 62.42/x
3. Step 3: Cross multiply
   111.55x = 153.92 × 62.42
4. Step 4: Simplify right side
   111.55x = 9,607.37
5. Step 5: Solve for x
   x = 9,607.37/111.55
6. Step 6: Final answer
   x = 86.13