Finding the Fourth Proportional to 131.29, 196.83 and 82.49

Step by Step Solution

1. Step 1: Write the proportion equation
   131.29 : 196.83 = 82.49 : x
2. Step 2: Convert to fraction form
   131.29/196.83 = 82.49/x
3. Step 3: Cross multiply
   131.29x = 196.83 × 82.49
4. Step 4: Simplify right side
   131.29x = 16,235.52
5. Step 5: Solve for x
   x = 16,235.52/131.29
6. Step 6: Final answer
   x = 123.66