Finding the Third Proportional to 9,640 and 20,740

Step by Step Solution

1. Step 1: Write the proportion equation
   9,640 : 20,740 = 20,740 : x
2. Step 2: Convert to fraction form
   9,640/20,740 = 20,740/x
3. Step 3: Cross multiply
   9,640x = 20,740 × 20,740
4. Step 4: Simplify right side
   9,640x = 430,147,600
5. Step 5: Solve for x
   x = 430,147,600/9,640
6. Step 6: Final answer
   x = 44,621.12