Finding the Fourth Proportional to 3,986.56, 5,501.46 and 2,218.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.56 : 5,501.46 = 2,218.17 : x
2. Step 2: Convert to fraction form
   3,986.56/5,501.46 = 2,218.17/x
3. Step 3: Cross multiply
   3,986.56x = 5,501.46 × 2,218.17
4. Step 4: Simplify right side
   3,986.56x = 12,203,155.93
5. Step 5: Solve for x
   x = 12,203,155.93/3,986.56
6. Step 6: Final answer
   x = 3,061.07