Finding the Fourth Proportional to 3,978.59, 5,490.65 and 2,300.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.59 : 5,490.65 = 2,300.23 : x
2. Step 2: Convert to fraction form
   3,978.59/5,490.65 = 2,300.23/x
3. Step 3: Cross multiply
   3,978.59x = 5,490.65 × 2,300.23
4. Step 4: Simplify right side
   3,978.59x = 12,629,757.85
5. Step 5: Solve for x
   x = 12,629,757.85/3,978.59
6. Step 6: Final answer
   x = 3,174.43