Finding the Fourth Proportional to 17,105.13, 25,658.42 and 5,418.09

Step by Step Solution

1. Step 1: Write the proportion equation
   17,105.13 : 25,658.42 = 5,418.09 : x
2. Step 2: Convert to fraction form
   17,105.13/25,658.42 = 5,418.09/x
3. Step 3: Cross multiply
   17,105.13x = 25,658.42 × 5,418.09
4. Step 4: Simplify right side
   17,105.13x = 139,019,601.73
5. Step 5: Solve for x
   x = 139,019,601.73/17,105.13
6. Step 6: Final answer
   x = 8,127.36