Finding the Fourth Proportional to 2,321.98, 3,481.38 and 860.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,321.98 : 3,481.38 = 860.35 : x
2. Step 2: Convert to fraction form
   2,321.98/3,481.38 = 860.35/x
3. Step 3: Cross multiply
   2,321.98x = 3,481.38 × 860.35
4. Step 4: Simplify right side
   2,321.98x = 2,995,205.28
5. Step 5: Solve for x
   x = 2,995,205.28/2,321.98
6. Step 6: Final answer
   x = 1,289.94