Finding the Fourth Proportional to 3,978.67, 5,489.98 and 2,210.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.67 : 5,489.98 = 2,210.27 : x
2. Step 2: Convert to fraction form
   3,978.67/5,489.98 = 2,210.27/x
3. Step 3: Cross multiply
   3,978.67x = 5,489.98 × 2,210.27
4. Step 4: Simplify right side
   3,978.67x = 12,134,359.16
5. Step 5: Solve for x
   x = 12,134,359.16/3,978.67
6. Step 6: Final answer
   x = 3,049.85