Finding the Third Proportional to 8,404.75 and 12,819.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.75 : 12,819.75 = 12,819.75 : x
2. Step 2: Convert to fraction form
   8,404.75/12,819.75 = 12,819.75/x
3. Step 3: Cross multiply
   8,404.75x = 12,819.75 × 12,819.75
4. Step 4: Simplify right side
   8,404.75x = 164,345,990.06
5. Step 5: Solve for x
   x = 164,345,990.06/8,404.75
6. Step 6: Final answer
   x = 19,553.94