Finding the Fourth Proportional to 82.72, 113.18 and 82.38

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 113.18 = 82.38 : x
2. Step 2: Convert to fraction form
   82.72/113.18 = 82.38/x
3. Step 3: Cross multiply
   82.72x = 113.18 × 82.38
4. Step 4: Simplify right side
   82.72x = 9,323.77
5. Step 5: Solve for x
   x = 9,323.77/82.72
6. Step 6: Final answer
   x = 112.71