Finding the Fourth Proportional to 111.42, 167.43 and 108.54

Step by Step Solution

1. Step 1: Write the proportion equation
   111.42 : 167.43 = 108.54 : x
2. Step 2: Convert to fraction form
   111.42/167.43 = 108.54/x
3. Step 3: Cross multiply
   111.42x = 167.43 × 108.54
4. Step 4: Simplify right side
   111.42x = 18,172.85
5. Step 5: Solve for x
   x = 18,172.85/111.42
6. Step 6: Final answer
   x = 163.10