Finding the Fourth Proportional to 17,145.40, 25,719.99 and 5,455.89

Step by Step Solution

1. Step 1: Write the proportion equation
   17,145.40 : 25,719.99 = 5,455.89 : x
2. Step 2: Convert to fraction form
   17,145.40/25,719.99 = 5,455.89/x
3. Step 3: Cross multiply
   17,145.40x = 25,719.99 × 5,455.89
4. Step 4: Simplify right side
   17,145.40x = 140,325,436.24
5. Step 5: Solve for x
   x = 140,325,436.24/17,145.40
6. Step 6: Final answer
   x = 8,184.44