Finding the Fourth Proportional to 111.29, 153.59 and 62.18

Step by Step Solution

1. Step 1: Write the proportion equation
   111.29 : 153.59 = 62.18 : x
2. Step 2: Convert to fraction form
   111.29/153.59 = 62.18/x
3. Step 3: Cross multiply
   111.29x = 153.59 × 62.18
4. Step 4: Simplify right side
   111.29x = 9,549.72
5. Step 5: Solve for x
   x = 9,549.72/111.29
6. Step 6: Final answer
   x = 85.81