Finding the Third Proportional to 9,039 and 12,315

Step by Step Solution

1. Step 1: Write the proportion equation
   9,039 : 12,315 = 12,315 : x
2. Step 2: Convert to fraction form
   9,039/12,315 = 12,315/x
3. Step 3: Cross multiply
   9,039x = 12,315 × 12,315
4. Step 4: Simplify right side
   9,039x = 151,659,225
5. Step 5: Solve for x
   x = 151,659,225/9,039
6. Step 6: Final answer
   x = 16,778.32