Finding the Fourth Proportional to 111.88, 154.14 and 82.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111.88 : 154.14 = 82.72 : x
2. Step 2: Convert to fraction form
   111.88/154.14 = 82.72/x
3. Step 3: Cross multiply
   111.88x = 154.14 × 82.72
4. Step 4: Simplify right side
   111.88x = 12,750.46
5. Step 5: Solve for x
   x = 12,750.46/111.88
6. Step 6: Final answer
   x = 113.97