Finding the Fourth Proportional to 111.96, 168.03 and 71.46

Step by Step Solution

1. Step 1: Write the proportion equation
   111.96 : 168.03 = 71.46 : x
2. Step 2: Convert to fraction form
   111.96/168.03 = 71.46/x
3. Step 3: Cross multiply
   111.96x = 168.03 × 71.46
4. Step 4: Simplify right side
   111.96x = 12,007.42
5. Step 5: Solve for x
   x = 12,007.42/111.96
6. Step 6: Final answer
   x = 107.25