Finding the Fourth Proportional to 10,687.36, 16,028.88 and 8,950.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,687.36 : 16,028.88 = 8,950.72 : x
2. Step 2: Convert to fraction form
   10,687.36/16,028.88 = 8,950.72/x
3. Step 3: Cross multiply
   10,687.36x = 16,028.88 × 8,950.72
4. Step 4: Simplify right side
   10,687.36x = 143,470,016.79
5. Step 5: Solve for x
   x = 143,470,016.79/10,687.36
6. Step 6: Final answer
   x = 13,424.27