Finding the Fourth Proportional to 131.69, 181.71 and 82.56

Step by Step Solution

1. Step 1: Write the proportion equation
   131.69 : 181.71 = 82.56 : x
2. Step 2: Convert to fraction form
   131.69/181.71 = 82.56/x
3. Step 3: Cross multiply
   131.69x = 181.71 × 82.56
4. Step 4: Simplify right side
   131.69x = 15,001.98
5. Step 5: Solve for x
   x = 15,001.98/131.69
6. Step 6: Final answer
   x = 113.92