Finding the Fourth Proportional to 16,772.84, 23,146.72 and 9,219.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,772.84 : 23,146.72 = 9,219.12 : x
2. Step 2: Convert to fraction form
   16,772.84/23,146.72 = 9,219.12/x
3. Step 3: Cross multiply
   16,772.84x = 23,146.72 × 9,219.12
4. Step 4: Simplify right side
   16,772.84x = 213,392,285.92
5. Step 5: Solve for x
   x = 213,392,285.92/16,772.84
6. Step 6: Final answer
   x = 12,722.49