Finding the Fourth Proportional to 3,983.96, 5,497.82 and 2,215.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983.96 : 5,497.82 = 2,215.72 : x
2. Step 2: Convert to fraction form
   3,983.96/5,497.82 = 2,215.72/x
3. Step 3: Cross multiply
   3,983.96x = 5,497.82 × 2,215.72
4. Step 4: Simplify right side
   3,983.96x = 12,181,629.73
5. Step 5: Solve for x
   x = 12,181,629.73/3,983.96
6. Step 6: Final answer
   x = 3,057.67