Finding the Fourth Proportional to 10,720.43, 16,105.37 and 10,277.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,720.43 : 16,105.37 = 10,277.57 : x
2. Step 2: Convert to fraction form
   10,720.43/16,105.37 = 10,277.57/x
3. Step 3: Cross multiply
   10,720.43x = 16,105.37 × 10,277.57
4. Step 4: Simplify right side
   10,720.43x = 165,524,016.16
5. Step 5: Solve for x
   x = 165,524,016.16/10,720.43
6. Step 6: Final answer
   x = 15,440.05