Finding the Fourth Proportional to 16,672.47, 23,007.15 and 9,117.33

Step by Step Solution

1. Step 1: Write the proportion equation
   16,672.47 : 23,007.15 = 9,117.33 : x
2. Step 2: Convert to fraction form
   16,672.47/23,007.15 = 9,117.33/x
3. Step 3: Cross multiply
   16,672.47x = 23,007.15 × 9,117.33
4. Step 4: Simplify right side
   16,672.47x = 209,763,778.91
5. Step 5: Solve for x
   x = 209,763,778.91/16,672.47
6. Step 6: Final answer
   x = 12,581.45