Finding the Fourth Proportional to 82.28, 113.52 and 52.76

Step by Step Solution

1. Step 1: Write the proportion equation
   82.28 : 113.52 = 52.76 : x
2. Step 2: Convert to fraction form
   82.28/113.52 = 52.76/x
3. Step 3: Cross multiply
   82.28x = 113.52 × 52.76
4. Step 4: Simplify right side
   82.28x = 5,989.32
5. Step 5: Solve for x
   x = 5,989.32/82.28
6. Step 6: Final answer
   x = 72.79