Finding the Fourth Proportional to 111.85, 167.42 and 57.67

Step by Step Solution

1. Step 1: Write the proportion equation
   111.85 : 167.42 = 57.67 : x
2. Step 2: Convert to fraction form
   111.85/167.42 = 57.67/x
3. Step 3: Cross multiply
   111.85x = 167.42 × 57.67
4. Step 4: Simplify right side
   111.85x = 9,654.82
5. Step 5: Solve for x
   x = 9,654.82/111.85
6. Step 6: Final answer
   x = 86.32