Finding the Fourth Proportional to 13,389.09, 18,479.55 and 7,727.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,389.09 : 18,479.55 = 7,727.52 : x
2. Step 2: Convert to fraction form
   13,389.09/18,479.55 = 7,727.52/x
3. Step 3: Cross multiply
   13,389.09x = 18,479.55 × 7,727.52
4. Step 4: Simplify right side
   13,389.09x = 142,801,092.22
5. Step 5: Solve for x
   x = 142,801,092.22/13,389.09
6. Step 6: Final answer
   x = 10,665.48