Finding the Fourth Proportional to 16,669.74, 23,003.91 and 9,115.86

Step by Step Solution

1. Step 1: Write the proportion equation
   16,669.74 : 23,003.91 = 9,115.86 : x
2. Step 2: Convert to fraction form
   16,669.74/23,003.91 = 9,115.86/x
3. Step 3: Cross multiply
   16,669.74x = 23,003.91 × 9,115.86
4. Step 4: Simplify right side
   16,669.74x = 209,700,423.01
5. Step 5: Solve for x
   x = 209,700,423.01/16,669.74
6. Step 6: Final answer
   x = 12,579.71