Finding the Fourth Proportional to 111.42, 167.46 and 108.39

Step by Step Solution

1. Step 1: Write the proportion equation
   111.42 : 167.46 = 108.39 : x
2. Step 2: Convert to fraction form
   111.42/167.46 = 108.39/x
3. Step 3: Cross multiply
   111.42x = 167.46 × 108.39
4. Step 4: Simplify right side
   111.42x = 18,150.99
5. Step 5: Solve for x
   x = 18,150.99/111.42
6. Step 6: Final answer
   x = 162.91