Finding the Fourth Proportional to 115.09, 158.83 and 82.49

Step by Step Solution

1. Step 1: Write the proportion equation
   115.09 : 158.83 = 82.49 : x
2. Step 2: Convert to fraction form
   115.09/158.83 = 82.49/x
3. Step 3: Cross multiply
   115.09x = 158.83 × 82.49
4. Step 4: Simplify right side
   115.09x = 13,100.89
5. Step 5: Solve for x
   x = 13,100.89/115.09
6. Step 6: Final answer
   x = 113.83