Finding the Fourth Proportional to 3,978.73, 5,490.57 and 2,210.41

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.73 : 5,490.57 = 2,210.41 : x
2. Step 2: Convert to fraction form
   3,978.73/5,490.57 = 2,210.41/x
3. Step 3: Cross multiply
   3,978.73x = 5,490.57 × 2,210.41
4. Step 4: Simplify right side
   3,978.73x = 12,136,410.83
5. Step 5: Solve for x
   x = 12,136,410.83/3,978.73
6. Step 6: Final answer
   x = 3,050.32