Finding the Fourth Proportional to 6,825.72, 10,242.24 and 3,909.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,825.72 : 10,242.24 = 3,909.72 : x
2. Step 2: Convert to fraction form
   6,825.72/10,242.24 = 3,909.72/x
3. Step 3: Cross multiply
   6,825.72x = 10,242.24 × 3,909.72
4. Step 4: Simplify right side
   6,825.72x = 40,044,290.57
5. Step 5: Solve for x
   x = 40,044,290.57/6,825.72
6. Step 6: Final answer
   x = 5,866.68