Finding the Fourth Proportional to 2,339.62, 3,508.31 and 878.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.62 : 3,508.31 = 878.74 : x
2. Step 2: Convert to fraction form
   2,339.62/3,508.31 = 878.74/x
3. Step 3: Cross multiply
   2,339.62x = 3,508.31 × 878.74
4. Step 4: Simplify right side
   2,339.62x = 3,082,892.33
5. Step 5: Solve for x
   x = 3,082,892.33/2,339.62
6. Step 6: Final answer
   x = 1,317.69