Finding the Fourth Proportional to 22,891.92, 31,589.10 and 12,819

Step by Step Solution

1. Step 1: Write the proportion equation
   22,891.92 : 31,589.10 = 12,819 : x
2. Step 2: Convert to fraction form
   22,891.92/31,589.10 = 12,819/x
3. Step 3: Cross multiply
   22,891.92x = 31,589.10 × 12,819
4. Step 4: Simplify right side
   22,891.92x = 404,940,672.90
5. Step 5: Solve for x
   x = 404,940,672.90/22,891.92
6. Step 6: Final answer
   x = 17,689.24