Finding the Fourth Proportional to 3,983.99, 5,498.01 and 2,215.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983.99 : 5,498.01 = 2,215.69 : x
2. Step 2: Convert to fraction form
   3,983.99/5,498.01 = 2,215.69/x
3. Step 3: Cross multiply
   3,983.99x = 5,498.01 × 2,215.69
4. Step 4: Simplify right side
   3,983.99x = 12,181,872.03
5. Step 5: Solve for x
   x = 12,181,872.03/3,983.99
6. Step 6: Final answer
   x = 3,057.71