Finding the Fourth Proportional to 10,571.94, 15,853.32 and 5,640.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,571.94 : 15,853.32 = 5,640.48 : x
2. Step 2: Convert to fraction form
   10,571.94/15,853.32 = 5,640.48/x
3. Step 3: Cross multiply
   10,571.94x = 15,853.32 × 5,640.48
4. Step 4: Simplify right side
   10,571.94x = 89,420,334.39
5. Step 5: Solve for x
   x = 89,420,334.39/10,571.94
6. Step 6: Final answer
   x = 8,458.27