Finding the Fourth Proportional to 10,564.72, 15,849.60 and 3,639.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,564.72 : 15,849.60 = 3,639.28 : x
2. Step 2: Convert to fraction form
   10,564.72/15,849.60 = 3,639.28/x
3. Step 3: Cross multiply
   10,564.72x = 15,849.60 × 3,639.28
4. Step 4: Simplify right side
   10,564.72x = 57,681,132.29
5. Step 5: Solve for x
   x = 57,681,132.29/10,564.72
6. Step 6: Final answer
   x = 5,459.79