Finding the Fourth Proportional to 3,724.72, 5,139.97 and 2,046.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,724.72 : 5,139.97 = 2,046.20 : x
2. Step 2: Convert to fraction form
   3,724.72/5,139.97 = 2,046.20/x
3. Step 3: Cross multiply
   3,724.72x = 5,139.97 × 2,046.20
4. Step 4: Simplify right side
   3,724.72x = 10,517,375.80
5. Step 5: Solve for x
   x = 10,517,375.80/3,724.72
6. Step 6: Final answer
   x = 2,823.67