Finding the Third Proportional to 8,315.75 and 12,229.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,315.75 : 12,229.88 = 12,229.88 : x
2. Step 2: Convert to fraction form
   8,315.75/12,229.88 = 12,229.88/x
3. Step 3: Cross multiply
   8,315.75x = 12,229.88 × 12,229.88
4. Step 4: Simplify right side
   8,315.75x = 149,569,842.52
5. Step 5: Solve for x
   x = 149,569,842.52/8,315.75
6. Step 6: Final answer
   x = 17,986.33