Finding the Third Proportional to 9,688 and 20,540

Step by Step Solution

1. Step 1: Write the proportion equation
   9,688 : 20,540 = 20,540 : x
2. Step 2: Convert to fraction form
   9,688/20,540 = 20,540/x
3. Step 3: Cross multiply
   9,688x = 20,540 × 20,540
4. Step 4: Simplify right side
   9,688x = 421,891,600
5. Step 5: Solve for x
   x = 421,891,600/9,688
6. Step 6: Final answer
   x = 43,547.85