Finding the Fourth Proportional to 15,929.91, 21,983.55 and 8,760.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,929.91 : 21,983.55 = 8,760.12 : x
2. Step 2: Convert to fraction form
   15,929.91/21,983.55 = 8,760.12/x
3. Step 3: Cross multiply
   15,929.91x = 21,983.55 × 8,760.12
4. Step 4: Simplify right side
   15,929.91x = 192,578,536.03
5. Step 5: Solve for x
   x = 192,578,536.03/15,929.91
6. Step 6: Final answer
   x = 12,089.12