Finding the Fourth Proportional to 111.72, 167.34 and 75.48

Step by Step Solution

1. Step 1: Write the proportion equation
   111.72 : 167.34 = 75.48 : x
2. Step 2: Convert to fraction form
   111.72/167.34 = 75.48/x
3. Step 3: Cross multiply
   111.72x = 167.34 × 75.48
4. Step 4: Simplify right side
   111.72x = 12,630.82
5. Step 5: Solve for x
   x = 12,630.82/111.72
6. Step 6: Final answer
   x = 113.06