Finding the Fourth Proportional to 15,616.69, 21,544.50 and 10,240.42

Step by Step Solution

1. Step 1: Write the proportion equation
   15,616.69 : 21,544.50 = 10,240.42 : x
2. Step 2: Convert to fraction form
   15,616.69/21,544.50 = 10,240.42/x
3. Step 3: Cross multiply
   15,616.69x = 21,544.50 × 10,240.42
4. Step 4: Simplify right side
   15,616.69x = 220,624,728.69
5. Step 5: Solve for x
   x = 220,624,728.69/15,616.69
6. Step 6: Final answer
   x = 14,127.50