Finding the Fourth Proportional to 16,772.21, 23,145.89 and 9,219.24

Step by Step Solution

1. Step 1: Write the proportion equation
   16,772.21 : 23,145.89 = 9,219.24 : x
2. Step 2: Convert to fraction form
   16,772.21/23,145.89 = 9,219.24/x
3. Step 3: Cross multiply
   16,772.21x = 23,145.89 × 9,219.24
4. Step 4: Simplify right side
   16,772.21x = 213,387,520.69
5. Step 5: Solve for x
   x = 213,387,520.69/16,772.21
6. Step 6: Final answer
   x = 12,722.68