Finding the Fourth Proportional to 82.02, 122.83 and 40.82

Step by Step Solution

1. Step 1: Write the proportion equation
   82.02 : 122.83 = 40.82 : x
2. Step 2: Convert to fraction form
   82.02/122.83 = 40.82/x
3. Step 3: Cross multiply
   82.02x = 122.83 × 40.82
4. Step 4: Simplify right side
   82.02x = 5,013.20
5. Step 5: Solve for x
   x = 5,013.20/82.02
6. Step 6: Final answer
   x = 61.12