Finding the Fourth Proportional to 111.56, 153.94 and 62.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.56 : 153.94 = 62.42 : x
2. Step 2: Convert to fraction form
   111.56/153.94 = 62.42/x
3. Step 3: Cross multiply
   111.56x = 153.94 × 62.42
4. Step 4: Simplify right side
   111.56x = 9,608.93
5. Step 5: Solve for x
   x = 9,608.93/111.56
6. Step 6: Final answer
   x = 86.13