Finding the Fourth Proportional to 11,728.28, 17,595.15 and 3,408.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,728.28 : 17,595.15 = 3,408.47 : x
2. Step 2: Convert to fraction form
   11,728.28/17,595.15 = 3,408.47/x
3. Step 3: Cross multiply
   11,728.28x = 17,595.15 × 3,408.47
4. Step 4: Simplify right side
   11,728.28x = 59,972,452.94
5. Step 5: Solve for x
   x = 59,972,452.94/11,728.28
6. Step 6: Final answer
   x = 5,113.49