Finding the Fourth Proportional to 12,009.43, 16,572.09 and 7,229.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,009.43 : 16,572.09 = 7,229.62 : x
2. Step 2: Convert to fraction form
   12,009.43/16,572.09 = 7,229.62/x
3. Step 3: Cross multiply
   12,009.43x = 16,572.09 × 7,229.62
4. Step 4: Simplify right side
   12,009.43x = 119,809,913.31
5. Step 5: Solve for x
   x = 119,809,913.31/12,009.43
6. Step 6: Final answer
   x = 9,976.32