Finding the Fourth Proportional to 82.96, 123.52 and 82.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82.96 : 123.52 = 82.56 : x
2. Step 2: Convert to fraction form
   82.96/123.52 = 82.56/x
3. Step 3: Cross multiply
   82.96x = 123.52 × 82.56
4. Step 4: Simplify right side
   82.96x = 10,197.81
5. Step 5: Solve for x
   x = 10,197.81/82.96
6. Step 6: Final answer
   x = 122.92