Finding the Third Proportional to 8,579.39 and 12,793.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,579.39 : 12,793.92 = 12,793.92 : x
2. Step 2: Convert to fraction form
   8,579.39/12,793.92 = 12,793.92/x
3. Step 3: Cross multiply
   8,579.39x = 12,793.92 × 12,793.92
4. Step 4: Simplify right side
   8,579.39x = 163,684,436.94
5. Step 5: Solve for x
   x = 163,684,436.94/8,579.39
6. Step 6: Final answer
   x = 19,078.80