Finding the Fourth Proportional to 131.52, 196.82 and 82.74

Step by Step Solution

1. Step 1: Write the proportion equation
   131.52 : 196.82 = 82.74 : x
2. Step 2: Convert to fraction form
   131.52/196.82 = 82.74/x
3. Step 3: Cross multiply
   131.52x = 196.82 × 82.74
4. Step 4: Simplify right side
   131.52x = 16,284.89
5. Step 5: Solve for x
   x = 16,284.89/131.52
6. Step 6: Final answer
   x = 123.82