Finding the Fourth Proportional to 16,669.38, 23,003.76 and 9,115.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,669.38 : 23,003.76 = 9,115.78 : x
2. Step 2: Convert to fraction form
   16,669.38/23,003.76 = 9,115.78/x
3. Step 3: Cross multiply
   16,669.38x = 23,003.76 × 9,115.78
4. Step 4: Simplify right side
   16,669.38x = 209,697,215.33
5. Step 5: Solve for x
   x = 209,697,215.33/16,669.38
6. Step 6: Final answer
   x = 12,579.78