Finding the Fourth Proportional to 82.01, 122.79 and 41.31

Step by Step Solution

1. Step 1: Write the proportion equation
   82.01 : 122.79 = 41.31 : x
2. Step 2: Convert to fraction form
   82.01/122.79 = 41.31/x
3. Step 3: Cross multiply
   82.01x = 122.79 × 41.31
4. Step 4: Simplify right side
   82.01x = 5,072.49
5. Step 5: Solve for x
   x = 5,072.49/82.01
6. Step 6: Final answer
   x = 61.85