Finding the Fourth Proportional to 3,983.69, 5,497.49 and 2,215.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983.69 : 5,497.49 = 2,215.25 : x
2. Step 2: Convert to fraction form
   3,983.69/5,497.49 = 2,215.25/x
3. Step 3: Cross multiply
   3,983.69x = 5,497.49 × 2,215.25
4. Step 4: Simplify right side
   3,983.69x = 12,178,328.47
5. Step 5: Solve for x
   x = 12,178,328.47/3,983.69
6. Step 6: Final answer
   x = 3,057.05