Finding the Fourth Proportional to 3,978.75, 5,490.05 and 2,299.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.75 : 5,490.05 = 2,299.83 : x
2. Step 2: Convert to fraction form
   3,978.75/5,490.05 = 2,299.83/x
3. Step 3: Cross multiply
   3,978.75x = 5,490.05 × 2,299.83
4. Step 4: Simplify right side
   3,978.75x = 12,626,187.44
5. Step 5: Solve for x
   x = 12,626,187.44/3,978.75
6. Step 6: Final answer
   x = 3,173.41