Finding the Fourth Proportional to 82.31, 113.54 and 52.79

Step by Step Solution

1. Step 1: Write the proportion equation
   82.31 : 113.54 = 52.79 : x
2. Step 2: Convert to fraction form
   82.31/113.54 = 52.79/x
3. Step 3: Cross multiply
   82.31x = 113.54 × 52.79
4. Step 4: Simplify right side
   82.31x = 5,993.88
5. Step 5: Solve for x
   x = 5,993.88/82.31
6. Step 6: Final answer
   x = 72.83