Finding the Fourth Proportional to 10,399.38, 15,589.54 and 3,820.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,399.38 : 15,589.54 = 3,820.56 : x
2. Step 2: Convert to fraction form
   10,399.38/15,589.54 = 3,820.56/x
3. Step 3: Cross multiply
   10,399.38x = 15,589.54 × 3,820.56
4. Step 4: Simplify right side
   10,399.38x = 59,560,772.94
5. Step 5: Solve for x
   x = 59,560,772.94/10,399.38
6. Step 6: Final answer
   x = 5,727.34