Finding the Fourth Proportional to 25,818.72, 38,724.42 and 8,286.27

Step by Step Solution

1. Step 1: Write the proportion equation
   25,818.72 : 38,724.42 = 8,286.27 : x
2. Step 2: Convert to fraction form
   25,818.72/38,724.42 = 8,286.27/x
3. Step 3: Cross multiply
   25,818.72x = 38,724.42 × 8,286.27
4. Step 4: Simplify right side
   25,818.72x = 320,880,999.71
5. Step 5: Solve for x
   x = 320,880,999.71/25,818.72
6. Step 6: Final answer
   x = 12,428.23