Finding the Fourth Proportional to 3,886.28, 5,363.90 and 2,560.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.28 : 5,363.90 = 2,560.10 : x
2. Step 2: Convert to fraction form
   3,886.28/5,363.90 = 2,560.10/x
3. Step 3: Cross multiply
   3,886.28x = 5,363.90 × 2,560.10
4. Step 4: Simplify right side
   3,886.28x = 13,732,107.59
5. Step 5: Solve for x
   x = 13,732,107.59/3,886.28
6. Step 6: Final answer
   x = 3,533.48