Finding the Fourth Proportional to 6,411.29, 8,845.49 and 3,578.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,411.29 : 8,845.49 = 3,578.20 : x
2. Step 2: Convert to fraction form
   6,411.29/8,845.49 = 3,578.20/x
3. Step 3: Cross multiply
   6,411.29x = 8,845.49 × 3,578.20
4. Step 4: Simplify right side
   6,411.29x = 31,650,919.15
5. Step 5: Solve for x
   x = 31,650,919.15/6,411.29
6. Step 6: Final answer
   x = 4,936.75