Finding the Third Proportional to 9,808 and 17,420

Step by Step Solution

1. Step 1: Write the proportion equation
   9,808 : 17,420 = 17,420 : x
2. Step 2: Convert to fraction form
   9,808/17,420 = 17,420/x
3. Step 3: Cross multiply
   9,808x = 17,420 × 17,420
4. Step 4: Simplify right side
   9,808x = 303,456,400
5. Step 5: Solve for x
   x = 303,456,400/9,808
6. Step 6: Final answer
   x = 30,939.68