Finding the Fourth Proportional to 16,872.80, 25,262.42 and 10,956.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,872.80 : 25,262.42 = 10,956.56 : x
2. Step 2: Convert to fraction form
   16,872.80/25,262.42 = 10,956.56/x
3. Step 3: Cross multiply
   16,872.80x = 25,262.42 × 10,956.56
4. Step 4: Simplify right side
   16,872.80x = 276,789,039.38
5. Step 5: Solve for x
   x = 276,789,039.38/16,872.80
6. Step 6: Final answer
   x = 16,404.46