Finding the Third Proportional to 8,486.46 and 12,469.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,486.46 : 12,469.89 = 12,469.89 : x
2. Step 2: Convert to fraction form
   8,486.46/12,469.89 = 12,469.89/x
3. Step 3: Cross multiply
   8,486.46x = 12,469.89 × 12,469.89
4. Step 4: Simplify right side
   8,486.46x = 155,498,074.78
5. Step 5: Solve for x
   x = 155,498,074.78/8,486.46
6. Step 6: Final answer
   x = 18,323.08