Finding the Fourth Proportional to 17,142.38, 25,716.45 and 5,459.18

Step by Step Solution

1. Step 1: Write the proportion equation
   17,142.38 : 25,716.45 = 5,459.18 : x
2. Step 2: Convert to fraction form
   17,142.38/25,716.45 = 5,459.18/x
3. Step 3: Cross multiply
   17,142.38x = 25,716.45 × 5,459.18
4. Step 4: Simplify right side
   17,142.38x = 140,390,729.51
5. Step 5: Solve for x
   x = 140,390,729.51/17,142.38
6. Step 6: Final answer
   x = 8,189.69