Finding the Fourth Proportional to 9,834.39, 13,571.43 and 5,643.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,834.39 : 13,571.43 = 5,643.99 : x
2. Step 2: Convert to fraction form
   9,834.39/13,571.43 = 5,643.99/x
3. Step 3: Cross multiply
   9,834.39x = 13,571.43 × 5,643.99
4. Step 4: Simplify right side
   9,834.39x = 76,597,015.21
5. Step 5: Solve for x
   x = 76,597,015.21/9,834.39
6. Step 6: Final answer
   x = 7,788.69