Finding the Fourth Proportional to 20,818.72, 31,227.92 and 8,498.08

Step by Step Solution

1. Step 1: Write the proportion equation
   20,818.72 : 31,227.92 = 8,498.08 : x
2. Step 2: Convert to fraction form
   20,818.72/31,227.92 = 8,498.08/x
3. Step 3: Cross multiply
   20,818.72x = 31,227.92 × 8,498.08
4. Step 4: Simplify right side
   20,818.72x = 265,377,362.39
5. Step 5: Solve for x
   x = 265,377,362.39/20,818.72
6. Step 6: Final answer
   x = 12,747.05