Finding the Fourth Proportional to 8,685.69, 13,035.83 and 3,759.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,685.69 : 13,035.83 = 3,759.09 : x
2. Step 2: Convert to fraction form
   8,685.69/13,035.83 = 3,759.09/x
3. Step 3: Cross multiply
   8,685.69x = 13,035.83 × 3,759.09
4. Step 4: Simplify right side
   8,685.69x = 49,002,839.40
5. Step 5: Solve for x
   x = 49,002,839.40/8,685.69
6. Step 6: Final answer
   x = 5,641.79