Finding the Fourth Proportional to 17,139.40, 25,710.99 and 5,449.89

Step by Step Solution

1. Step 1: Write the proportion equation
   17,139.40 : 25,710.99 = 5,449.89 : x
2. Step 2: Convert to fraction form
   17,139.40/25,710.99 = 5,449.89/x
3. Step 3: Cross multiply
   17,139.40x = 25,710.99 × 5,449.89
4. Step 4: Simplify right side
   17,139.40x = 140,122,067.29
5. Step 5: Solve for x
   x = 140,122,067.29/17,139.40
6. Step 6: Final answer
   x = 8,175.44