Finding the Fourth Proportional to 9,839.69, 13,578.78 and 5,363.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,839.69 : 13,578.78 = 5,363.45 : x
2. Step 2: Convert to fraction form
   9,839.69/13,578.78 = 5,363.45/x
3. Step 3: Cross multiply
   9,839.69x = 13,578.78 × 5,363.45
4. Step 4: Simplify right side
   9,839.69x = 72,829,107.59
5. Step 5: Solve for x
   x = 72,829,107.59/9,839.69
6. Step 6: Final answer
   x = 7,401.57