Finding the Fourth Proportional to 13,389.86, 18,480.29 and 7,723.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,389.86 : 18,480.29 = 7,723.59 : x
2. Step 2: Convert to fraction form
   13,389.86/18,480.29 = 7,723.59/x
3. Step 3: Cross multiply
   13,389.86x = 18,480.29 × 7,723.59
4. Step 4: Simplify right side
   13,389.86x = 142,734,183.04
5. Step 5: Solve for x
   x = 142,734,183.04/13,389.86
6. Step 6: Final answer
   x = 10,659.87