Finding the Fourth Proportional to 2,324.10, 3,483.90 and 861.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,324.10 : 3,483.90 = 861.78 : x
2. Step 2: Convert to fraction form
   2,324.10/3,483.90 = 861.78/x
3. Step 3: Cross multiply
   2,324.10x = 3,483.90 × 861.78
4. Step 4: Simplify right side
   2,324.10x = 3,002,355.34
5. Step 5: Solve for x
   x = 3,002,355.34/2,324.10
6. Step 6: Final answer
   x = 1,291.84