Finding the Third Proportional to 9,390 and 12,647

Step by Step Solution

1. Step 1: Write the proportion equation
   9,390 : 12,647 = 12,647 : x
2. Step 2: Convert to fraction form
   9,390/12,647 = 12,647/x
3. Step 3: Cross multiply
   9,390x = 12,647 × 12,647
4. Step 4: Simplify right side
   9,390x = 159,946,609
5. Step 5: Solve for x
   x = 159,946,609/9,390
6. Step 6: Final answer
   x = 17,033.72