Finding the Fourth Proportional to 15,929.69, 21,983.00 and 8,856.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,929.69 : 21,983.00 = 8,856.12 : x
2. Step 2: Convert to fraction form
   15,929.69/21,983.00 = 8,856.12/x
3. Step 3: Cross multiply
   15,929.69x = 21,983.00 × 8,856.12
4. Step 4: Simplify right side
   15,929.69x = 194,684,108.10
5. Step 5: Solve for x
   x = 194,684,108.10/15,929.69
6. Step 6: Final answer
   x = 12,221.46