Finding the Fourth Proportional to 17,105.38, 25,658.79 and 5,418.34

Step by Step Solution

1. Step 1: Write the proportion equation
   17,105.38 : 25,658.79 = 5,418.34 : x
2. Step 2: Convert to fraction form
   17,105.38/25,658.79 = 5,418.34/x
3. Step 3: Cross multiply
   17,105.38x = 25,658.79 × 5,418.34
4. Step 4: Simplify right side
   17,105.38x = 139,028,048.21
5. Step 5: Solve for x
   x = 139,028,048.21/17,105.38
6. Step 6: Final answer
   x = 8,127.74