Finding the Fourth Proportional to 17,401.38, 26,109.37 and 12,509.79

Step by Step Solution

1. Step 1: Write the proportion equation
   17,401.38 : 26,109.37 = 12,509.79 : x
2. Step 2: Convert to fraction form
   17,401.38/26,109.37 = 12,509.79/x
3. Step 3: Cross multiply
   17,401.38x = 26,109.37 × 12,509.79
4. Step 4: Simplify right side
   17,401.38x = 326,622,735.73
5. Step 5: Solve for x
   x = 326,622,735.73/17,401.38
6. Step 6: Final answer
   x = 18,769.93