Finding the Fourth Proportional to 111.16, 153.25 and 82

Step by Step Solution

1. Step 1: Write the proportion equation
   111.16 : 153.25 = 82 : x
2. Step 2: Convert to fraction form
   111.16/153.25 = 82/x
3. Step 3: Cross multiply
   111.16x = 153.25 × 82
4. Step 4: Simplify right side
   111.16x = 12,566.50
5. Step 5: Solve for x
   x = 12,566.50/111.16
6. Step 6: Final answer
   x = 113.05