Finding the Fourth Proportional to 2,329.59, 3,495.78 and 869.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,329.59 : 3,495.78 = 869.78 : x
2. Step 2: Convert to fraction form
   2,329.59/3,495.78 = 869.78/x
3. Step 3: Cross multiply
   2,329.59x = 3,495.78 × 869.78
4. Step 4: Simplify right side
   2,329.59x = 3,040,542.05
5. Step 5: Solve for x
   x = 3,040,542.05/2,329.59
6. Step 6: Final answer
   x = 1,305.18