Finding the Fourth Proportional to 111.92, 167.89 and 79.43

Step by Step Solution

1. Step 1: Write the proportion equation
   111.92 : 167.89 = 79.43 : x
2. Step 2: Convert to fraction form
   111.92/167.89 = 79.43/x
3. Step 3: Cross multiply
   111.92x = 167.89 × 79.43
4. Step 4: Simplify right side
   111.92x = 13,334.91
5. Step 5: Solve for x
   x = 13,334.91/111.92
6. Step 6: Final answer
   x = 119.15