Finding the Fourth Proportional to 13,124.96, 18,107.92 and 9,144.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,124.96 : 18,107.92 = 9,144.62 : x
2. Step 2: Convert to fraction form
   13,124.96/18,107.92 = 9,144.62/x
3. Step 3: Cross multiply
   13,124.96x = 18,107.92 × 9,144.62
4. Step 4: Simplify right side
   13,124.96x = 165,590,047.39
5. Step 5: Solve for x
   x = 165,590,047.39/13,124.96
6. Step 6: Final answer
   x = 12,616.42