Finding the Fourth Proportional to 17,142.91, 25,708.86 and 5,453.39

Step by Step Solution

1. Step 1: Write the proportion equation
   17,142.91 : 25,708.86 = 5,453.39 : x
2. Step 2: Convert to fraction form
   17,142.91/25,708.86 = 5,453.39/x
3. Step 3: Cross multiply
   17,142.91x = 25,708.86 × 5,453.39
4. Step 4: Simplify right side
   17,142.91x = 140,200,504.31
5. Step 5: Solve for x
   x = 140,200,504.31/17,142.91
6. Step 6: Final answer
   x = 8,178.34