Finding the Fourth Proportional to 9,839.55, 13,578.90 and 5,363.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,839.55 : 13,578.90 = 5,363.07 : x
2. Step 2: Convert to fraction form
   9,839.55/13,578.90 = 5,363.07/x
3. Step 3: Cross multiply
   9,839.55x = 13,578.90 × 5,363.07
4. Step 4: Simplify right side
   9,839.55x = 72,824,591.22
5. Step 5: Solve for x
   x = 72,824,591.22/9,839.55
6. Step 6: Final answer
   x = 7,401.21