Finding the Fourth Proportional to 82.48, 113.82 and 71.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82.48 : 113.82 = 71.56 : x
2. Step 2: Convert to fraction form
   82.48/113.82 = 71.56/x
3. Step 3: Cross multiply
   82.48x = 113.82 × 71.56
4. Step 4: Simplify right side
   82.48x = 8,144.96
5. Step 5: Solve for x
   x = 8,144.96/82.48
6. Step 6: Final answer
   x = 98.75