Finding the Fourth Proportional to 82.72, 123.08 and 82.46

Step by Step Solution

1. Step 1: Write the proportion equation
   82.72 : 123.08 = 82.46 : x
2. Step 2: Convert to fraction form
   82.72/123.08 = 82.46/x
3. Step 3: Cross multiply
   82.72x = 123.08 × 82.46
4. Step 4: Simplify right side
   82.72x = 10,149.18
5. Step 5: Solve for x
   x = 10,149.18/82.72
6. Step 6: Final answer
   x = 122.69