Finding the Fourth Proportional to 111.85, 167.83 and 43.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.85 : 167.83 = 43.42 : x
2. Step 2: Convert to fraction form
   111.85/167.83 = 43.42/x
3. Step 3: Cross multiply
   111.85x = 167.83 × 43.42
4. Step 4: Simplify right side
   111.85x = 7,287.18
5. Step 5: Solve for x
   x = 7,287.18/111.85
6. Step 6: Final answer
   x = 65.15