Finding the Fourth Proportional to 17,111.51, 25,668.17 and 5,425.64

Step by Step Solution

1. Step 1: Write the proportion equation
   17,111.51 : 25,668.17 = 5,425.64 : x
2. Step 2: Convert to fraction form
   17,111.51/25,668.17 = 5,425.64/x
3. Step 3: Cross multiply
   17,111.51x = 25,668.17 × 5,425.64
4. Step 4: Simplify right side
   17,111.51x = 139,266,249.88
5. Step 5: Solve for x
   x = 139,266,249.88/17,111.51
6. Step 6: Final answer
   x = 8,138.75