Finding the Fourth Proportional to 16,806.72, 25,208.28 and 5,120.04

Step by Step Solution

1. Step 1: Write the proportion equation
   16,806.72 : 25,208.28 = 5,120.04 : x
2. Step 2: Convert to fraction form
   16,806.72/25,208.28 = 5,120.04/x
3. Step 3: Cross multiply
   16,806.72x = 25,208.28 × 5,120.04
4. Step 4: Simplify right side
   16,806.72x = 129,067,401.93
5. Step 5: Solve for x
   x = 129,067,401.93/16,806.72
6. Step 6: Final answer
   x = 7,679.51