Finding the Fourth Proportional to 111.91, 167.92 and 103.41

Step by Step Solution

1. Step 1: Write the proportion equation
   111.91 : 167.92 = 103.41 : x
2. Step 2: Convert to fraction form
   111.91/167.92 = 103.41/x
3. Step 3: Cross multiply
   111.91x = 167.92 × 103.41
4. Step 4: Simplify right side
   111.91x = 17,364.61
5. Step 5: Solve for x
   x = 17,364.61/111.91
6. Step 6: Final answer
   x = 155.17