Finding the Third Proportional to 8,144.30 and 12,279.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,144.30 : 12,279.09 = 12,279.09 : x
2. Step 2: Convert to fraction form
   8,144.30/12,279.09 = 12,279.09/x
3. Step 3: Cross multiply
   8,144.30x = 12,279.09 × 12,279.09
4. Step 4: Simplify right side
   8,144.30x = 150,776,143.32
5. Step 5: Solve for x
   x = 150,776,143.32/8,144.30
6. Step 6: Final answer
   x = 18,513.10