Finding the Fourth Proportional to 20,614.49, 28,448.69 and 12,116.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,614.49 : 28,448.69 = 12,116.48 : x
2. Step 2: Convert to fraction form
   20,614.49/28,448.69 = 12,116.48/x
3. Step 3: Cross multiply
   20,614.49x = 28,448.69 × 12,116.48
4. Step 4: Simplify right side
   20,614.49x = 344,697,993.95
5. Step 5: Solve for x
   x = 344,697,993.95/20,614.49
6. Step 6: Final answer
   x = 16,721.15