Finding the Fourth Proportional to 3,978.97, 5,490.37 and 2,300.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.97 : 5,490.37 = 2,300.05 : x
2. Step 2: Convert to fraction form
   3,978.97/5,490.37 = 2,300.05/x
3. Step 3: Cross multiply
   3,978.97x = 5,490.37 × 2,300.05
4. Step 4: Simplify right side
   3,978.97x = 12,628,114.02
5. Step 5: Solve for x
   x = 12,628,114.02/3,978.97
6. Step 6: Final answer
   x = 3,173.72