Finding the Fourth Proportional to 3,986.14, 5,500.86 and 2,218.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.14 : 5,500.86 = 2,218.15 : x
2. Step 2: Convert to fraction form
   3,986.14/5,500.86 = 2,218.15/x
3. Step 3: Cross multiply
   3,986.14x = 5,500.86 × 2,218.15
4. Step 4: Simplify right side
   3,986.14x = 12,201,732.61
5. Step 5: Solve for x
   x = 12,201,732.61/3,986.14
6. Step 6: Final answer
   x = 3,061.04