Finding the Fourth Proportional to 82.07, 113.22 and 52.91

Step by Step Solution

1. Step 1: Write the proportion equation
   82.07 : 113.22 = 52.91 : x
2. Step 2: Convert to fraction form
   82.07/113.22 = 52.91/x
3. Step 3: Cross multiply
   82.07x = 113.22 × 52.91
4. Step 4: Simplify right side
   82.07x = 5,989.90
5. Step 5: Solve for x
   x = 5,989.90/82.07
6. Step 6: Final answer
   x = 72.99