Finding the Fourth Proportional to 8,685.09, 13,035.47 and 5,404.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,685.09 : 13,035.47 = 5,404.59 : x
2. Step 2: Convert to fraction form
   8,685.09/13,035.47 = 5,404.59/x
3. Step 3: Cross multiply
   8,685.09x = 13,035.47 × 5,404.59
4. Step 4: Simplify right side
   8,685.09x = 70,451,343.78
5. Step 5: Solve for x
   x = 70,451,343.78/8,685.09
6. Step 6: Final answer
   x = 8,111.76