Finding the Fourth Proportional to 22,891.46, 31,589.35 and 12,819.40

Step by Step Solution

1. Step 1: Write the proportion equation
   22,891.46 : 31,589.35 = 12,819.40 : x
2. Step 2: Convert to fraction form
   22,891.46/31,589.35 = 12,819.40/x
3. Step 3: Cross multiply
   22,891.46x = 31,589.35 × 12,819.40
4. Step 4: Simplify right side
   22,891.46x = 404,956,402.37
5. Step 5: Solve for x
   x = 404,956,402.37/22,891.46
6. Step 6: Final answer
   x = 17,690.29