Finding the Fourth Proportional to 20,348.71, 28,081.59 and 12,282.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,348.71 : 28,081.59 = 12,282.38 : x
2. Step 2: Convert to fraction form
   20,348.71/28,081.59 = 12,282.38/x
3. Step 3: Cross multiply
   20,348.71x = 28,081.59 × 12,282.38
4. Step 4: Simplify right side
   20,348.71x = 344,908,618.98
5. Step 5: Solve for x
   x = 344,908,618.98/20,348.71
6. Step 6: Final answer
   x = 16,949.90