Finding the Fourth Proportional to 10,144, 13,998.72 and 5,728

Step by Step Solution

1. Step 1: Write the proportion equation
   10,144 : 13,998.72 = 5,728 : x
2. Step 2: Convert to fraction form
   10,144/13,998.72 = 5,728/x
3. Step 3: Cross multiply
   10,144x = 13,998.72 × 5,728
4. Step 4: Simplify right side
   10,144x = 80,184,668.16
5. Step 5: Solve for x
   x = 80,184,668.16/10,144
6. Step 6: Final answer
   x = 7,904.64