Finding the Fourth Proportional to 3,978.53, 5,490.62 and 2,210.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.53 : 5,490.62 = 2,210.17 : x
2. Step 2: Convert to fraction form
   3,978.53/5,490.62 = 2,210.17/x
3. Step 3: Cross multiply
   3,978.53x = 5,490.62 × 2,210.17
4. Step 4: Simplify right side
   3,978.53x = 12,135,203.61
5. Step 5: Solve for x
   x = 12,135,203.61/3,978.53
6. Step 6: Final answer
   x = 3,050.17