Finding the Fourth Proportional to 111.69, 154.08 and 82.62

Step by Step Solution

1. Step 1: Write the proportion equation
   111.69 : 154.08 = 82.62 : x
2. Step 2: Convert to fraction form
   111.69/154.08 = 82.62/x
3. Step 3: Cross multiply
   111.69x = 154.08 × 82.62
4. Step 4: Simplify right side
   111.69x = 12,730.09
5. Step 5: Solve for x
   x = 12,730.09/111.69
6. Step 6: Final answer
   x = 113.98