Finding the Fourth Proportional to 3,986.67, 5,501.86 and 2,218.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.67 : 5,501.86 = 2,218.27 : x
2. Step 2: Convert to fraction form
   3,986.67/5,501.86 = 2,218.27/x
3. Step 3: Cross multiply
   3,986.67x = 5,501.86 × 2,218.27
4. Step 4: Simplify right side
   3,986.67x = 12,204,610.98
5. Step 5: Solve for x
   x = 12,204,610.98/3,986.67
6. Step 6: Final answer
   x = 3,061.35