Finding the Fourth Proportional to 11,074, 16,589.69 and 8,721.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,074 : 16,589.69 = 8,721.56 : x
2. Step 2: Convert to fraction form
   11,074/16,589.69 = 8,721.56/x
3. Step 3: Cross multiply
   11,074x = 16,589.69 × 8,721.56
4. Step 4: Simplify right side
   11,074x = 144,687,976.72
5. Step 5: Solve for x
   x = 144,687,976.72/11,074
6. Step 6: Final answer
   x = 13,065.56