Finding the Fourth Proportional to 16,339.08, 22,520.52 and 12,509.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,339.08 : 22,520.52 = 12,509.40 : x
2. Step 2: Convert to fraction form
   16,339.08/22,520.52 = 12,509.40/x
3. Step 3: Cross multiply
   16,339.08x = 22,520.52 × 12,509.40
4. Step 4: Simplify right side
   16,339.08x = 281,718,192.89
5. Step 5: Solve for x
   x = 281,718,192.89/16,339.08
6. Step 6: Final answer
   x = 17,241.99