Finding the Fourth Proportional to 12,417, 17,139.11 and 7,384.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,417 : 17,139.11 = 7,384.79 : x
2. Step 2: Convert to fraction form
   12,417/17,139.11 = 7,384.79/x
3. Step 3: Cross multiply
   12,417x = 17,139.11 × 7,384.79
4. Step 4: Simplify right side
   12,417x = 126,568,605.52
5. Step 5: Solve for x
   x = 126,568,605.52/12,417
6. Step 6: Final answer
   x = 10,193.17