Finding the Third Proportional to 8,119.75 and 12,231.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,119.75 : 12,231.88 = 12,231.88 : x
2. Step 2: Convert to fraction form
   8,119.75/12,231.88 = 12,231.88/x
3. Step 3: Cross multiply
   8,119.75x = 12,231.88 × 12,231.88
4. Step 4: Simplify right side
   8,119.75x = 149,618,766.02
5. Step 5: Solve for x
   x = 149,618,766.02/8,119.75
6. Step 6: Final answer
   x = 18,426.52