Finding the Fourth Proportional to 111.69, 154.17 and 107.82

Step by Step Solution

1. Step 1: Write the proportion equation
   111.69 : 154.17 = 107.82 : x
2. Step 2: Convert to fraction form
   111.69/154.17 = 107.82/x
3. Step 3: Cross multiply
   111.69x = 154.17 × 107.82
4. Step 4: Simplify right side
   111.69x = 16,622.61
5. Step 5: Solve for x
   x = 16,622.61/111.69
6. Step 6: Final answer
   x = 148.83