Finding the Fourth Proportional to 21,763.69, 30,033.89 and 12,816.73

Step by Step Solution

1. Step 1: Write the proportion equation
   21,763.69 : 30,033.89 = 12,816.73 : x
2. Step 2: Convert to fraction form
   21,763.69/30,033.89 = 12,816.73/x
3. Step 3: Cross multiply
   21,763.69x = 30,033.89 × 12,816.73
4. Step 4: Simplify right side
   21,763.69x = 384,936,280.50
5. Step 5: Solve for x
   x = 384,936,280.50/21,763.69
6. Step 6: Final answer
   x = 17,687.09