Finding the Third Proportional to 9,218 and 12,707

Step by Step Solution

1. Step 1: Write the proportion equation
   9,218 : 12,707 = 12,707 : x
2. Step 2: Convert to fraction form
   9,218/12,707 = 12,707/x
3. Step 3: Cross multiply
   9,218x = 12,707 × 12,707
4. Step 4: Simplify right side
   9,218x = 161,467,849
5. Step 5: Solve for x
   x = 161,467,849/9,218
6. Step 6: Final answer
   x = 17,516.58