Finding the Fourth Proportional to 6,411.31, 8,847.69 and 3,578.96

Step by Step Solution

1. Step 1: Write the proportion equation
   6,411.31 : 8,847.69 = 3,578.96 : x
2. Step 2: Convert to fraction form
   6,411.31/8,847.69 = 3,578.96/x
3. Step 3: Cross multiply
   6,411.31x = 8,847.69 × 3,578.96
4. Step 4: Simplify right side
   6,411.31x = 31,665,528.60
5. Step 5: Solve for x
   x = 31,665,528.60/6,411.31
6. Step 6: Final answer
   x = 4,939.01