Finding the Fourth Proportional to 13,468.72, 18,589.90 and 8,744.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,468.72 : 18,589.90 = 8,744.80 : x
2. Step 2: Convert to fraction form
   13,468.72/18,589.90 = 8,744.80/x
3. Step 3: Cross multiply
   13,468.72x = 18,589.90 × 8,744.80
4. Step 4: Simplify right side
   13,468.72x = 162,564,957.52
5. Step 5: Solve for x
   x = 162,564,957.52/13,468.72
6. Step 6: Final answer
   x = 12,069.81