Finding the Fourth Proportional to 111.78, 168.28 and 75.94

Step by Step Solution

1. Step 1: Write the proportion equation
   111.78 : 168.28 = 75.94 : x
2. Step 2: Convert to fraction form
   111.78/168.28 = 75.94/x
3. Step 3: Cross multiply
   111.78x = 168.28 × 75.94
4. Step 4: Simplify right side
   111.78x = 12,778.57
5. Step 5: Solve for x
   x = 12,778.57/111.78
6. Step 6: Final answer
   x = 114.32