Finding the Fourth Proportional to 21,849.91, 30,153.77 and 12,290.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,849.91 : 30,153.77 = 12,290.24 : x
2. Step 2: Convert to fraction form
   21,849.91/30,153.77 = 12,290.24/x
3. Step 3: Cross multiply
   21,849.91x = 30,153.77 × 12,290.24
4. Step 4: Simplify right side
   21,849.91x = 370,597,119.78
5. Step 5: Solve for x
   x = 370,597,119.78/21,849.91
6. Step 6: Final answer
   x = 16,961.04