Finding the Third Proportional to 9,040 and 12,315

Step by Step Solution

1. Step 1: Write the proportion equation
   9,040 : 12,315 = 12,315 : x
2. Step 2: Convert to fraction form
   9,040/12,315 = 12,315/x
3. Step 3: Cross multiply
   9,040x = 12,315 × 12,315
4. Step 4: Simplify right side
   9,040x = 151,659,225
5. Step 5: Solve for x
   x = 151,659,225/9,040
6. Step 6: Final answer
   x = 16,776.46