Finding the Fourth Proportional to 131.56, 181.50 and 82.42

Step by Step Solution

1. Step 1: Write the proportion equation
   131.56 : 181.50 = 82.42 : x
2. Step 2: Convert to fraction form
   131.56/181.50 = 82.42/x
3. Step 3: Cross multiply
   131.56x = 181.50 × 82.42
4. Step 4: Simplify right side
   131.56x = 14,959.23
5. Step 5: Solve for x
   x = 14,959.23/131.56
6. Step 6: Final answer
   x = 113.71