Finding the Fourth Proportional to 6,264.57, 8,643.92 and 3,905.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,264.57 : 8,643.92 = 3,905.31 : x
2. Step 2: Convert to fraction form
   6,264.57/8,643.92 = 3,905.31/x
3. Step 3: Cross multiply
   6,264.57x = 8,643.92 × 3,905.31
4. Step 4: Simplify right side
   6,264.57x = 33,757,167.69
5. Step 5: Solve for x
   x = 33,757,167.69/6,264.57
6. Step 6: Final answer
   x = 5,388.58