Finding the Fourth Proportional to 9,839.65, 13,578.72 and 5,363.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,839.65 : 13,578.72 = 5,363.31 : x
2. Step 2: Convert to fraction form
   9,839.65/13,578.72 = 5,363.31/x
3. Step 3: Cross multiply
   9,839.65x = 13,578.72 × 5,363.31
4. Step 4: Simplify right side
   9,839.65x = 72,826,884.76
5. Step 5: Solve for x
   x = 72,826,884.76/9,839.65
6. Step 6: Final answer
   x = 7,401.37