Finding the Fourth Proportional to 3,998.72, 5,517.83 and 2,320.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998.72 : 5,517.83 = 2,320.23 : x
2. Step 2: Convert to fraction form
   3,998.72/5,517.83 = 2,320.23/x
3. Step 3: Cross multiply
   3,998.72x = 5,517.83 × 2,320.23
4. Step 4: Simplify right side
   3,998.72x = 12,802,640.50
5. Step 5: Solve for x
   x = 12,802,640.50/3,998.72
6. Step 6: Final answer
   x = 3,201.69