Finding the Fourth Proportional to 3,978.52, 5,489.71 and 2,300.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.52 : 5,489.71 = 2,300.15 : x
2. Step 2: Convert to fraction form
   3,978.52/5,489.71 = 2,300.15/x
3. Step 3: Cross multiply
   3,978.52x = 5,489.71 × 2,300.15
4. Step 4: Simplify right side
   3,978.52x = 12,627,164.43
5. Step 5: Solve for x
   x = 12,627,164.43/3,978.52
6. Step 6: Final answer
   x = 3,173.84