Finding the Fourth Proportional to 17,143.40, 25,716.99 and 5,453.89

Step by Step Solution

1. Step 1: Write the proportion equation
   17,143.40 : 25,716.99 = 5,453.89 : x
2. Step 2: Convert to fraction form
   17,143.40/25,716.99 = 5,453.89/x
3. Step 3: Cross multiply
   17,143.40x = 25,716.99 × 5,453.89
4. Step 4: Simplify right side
   17,143.40x = 140,257,634.59
5. Step 5: Solve for x
   x = 140,257,634.59/17,143.40
6. Step 6: Final answer
   x = 8,181.44