Finding the Fourth Proportional to 2,399.46, 3,597 and 860.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.46 : 3,597 = 860.10 : x
2. Step 2: Convert to fraction form
   2,399.46/3,597 = 860.10/x
3. Step 3: Cross multiply
   2,399.46x = 3,597 × 860.10
4. Step 4: Simplify right side
   2,399.46x = 3,093,779.70
5. Step 5: Solve for x
   x = 3,093,779.70/2,399.46
6. Step 6: Final answer
   x = 1,289.36