Finding the Fourth Proportional to 111.42, 167.22 and 75.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.42 : 167.22 = 75.42 : x
2. Step 2: Convert to fraction form
   111.42/167.22 = 75.42/x
3. Step 3: Cross multiply
   111.42x = 167.22 × 75.42
4. Step 4: Simplify right side
   111.42x = 12,611.73
5. Step 5: Solve for x
   x = 12,611.73/111.42
6. Step 6: Final answer
   x = 113.19