Finding the Fourth Proportional to 2,320.24, 3,481.72 and 860.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,320.24 : 3,481.72 = 860.42 : x
2. Step 2: Convert to fraction form
   2,320.24/3,481.72 = 860.42/x
3. Step 3: Cross multiply
   2,320.24x = 3,481.72 × 860.42
4. Step 4: Simplify right side
   2,320.24x = 2,995,741.52
5. Step 5: Solve for x
   x = 2,995,741.52/2,320.24
6. Step 6: Final answer
   x = 1,291.13