Finding the Fourth Proportional to 10,857.48, 16,367.61 and 10,134.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,857.48 : 16,367.61 = 10,134.15 : x
2. Step 2: Convert to fraction form
   10,857.48/16,367.61 = 10,134.15/x
3. Step 3: Cross multiply
   10,857.48x = 16,367.61 × 10,134.15
4. Step 4: Simplify right side
   10,857.48x = 165,871,814.88
5. Step 5: Solve for x
   x = 165,871,814.88/10,857.48
6. Step 6: Final answer
   x = 15,277.19