Finding the Third Proportional to 9,145 and 12,257

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145 : 12,257 = 12,257 : x
2. Step 2: Convert to fraction form
   9,145/12,257 = 12,257/x
3. Step 3: Cross multiply
   9,145x = 12,257 × 12,257
4. Step 4: Simplify right side
   9,145x = 150,234,049
5. Step 5: Solve for x
   x = 150,234,049/9,145
6. Step 6: Final answer
   x = 16,428.00