Finding the Fourth Proportional to 3,978.42, 5,490.24 and 2,210.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.42 : 5,490.24 = 2,210.04 : x
2. Step 2: Convert to fraction form
   3,978.42/5,490.24 = 2,210.04/x
3. Step 3: Cross multiply
   3,978.42x = 5,490.24 × 2,210.04
4. Step 4: Simplify right side
   3,978.42x = 12,133,650.01
5. Step 5: Solve for x
   x = 12,133,650.01/3,978.42
6. Step 6: Final answer
   x = 3,049.87