Finding the Fourth Proportional to 2,399.56, 3,600.98 and 860.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.56 : 3,600.98 = 860.56 : x
2. Step 2: Convert to fraction form
   2,399.56/3,600.98 = 860.56/x
3. Step 3: Cross multiply
   2,399.56x = 3,600.98 × 860.56
4. Step 4: Simplify right side
   2,399.56x = 3,098,859.35
5. Step 5: Solve for x
   x = 3,098,859.35/2,399.56
6. Step 6: Final answer
   x = 1,291.43