Finding the Fourth Proportional to 21,744.69, 30,006.83 and 12,313.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,744.69 : 30,006.83 = 12,313.28 : x
2. Step 2: Convert to fraction form
   21,744.69/30,006.83 = 12,313.28/x
3. Step 3: Cross multiply
   21,744.69x = 30,006.83 × 12,313.28
4. Step 4: Simplify right side
   21,744.69x = 369,482,380.45
5. Step 5: Solve for x
   x = 369,482,380.45/21,744.69
6. Step 6: Final answer
   x = 16,991.84