Finding the Fourth Proportional to 11,995.38, 16,545.06 and 10,399.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,995.38 : 16,545.06 = 10,399.18 : x
2. Step 2: Convert to fraction form
   11,995.38/16,545.06 = 10,399.18/x
3. Step 3: Cross multiply
   11,995.38x = 16,545.06 × 10,399.18
4. Step 4: Simplify right side
   11,995.38x = 172,054,976.69
5. Step 5: Solve for x
   x = 172,054,976.69/11,995.38
6. Step 6: Final answer
   x = 14,343.43