Finding the Third Proportional to 9,764 and 20,688

Step by Step Solution

1. Step 1: Write the proportion equation
   9,764 : 20,688 = 20,688 : x
2. Step 2: Convert to fraction form
   9,764/20,688 = 20,688/x
3. Step 3: Cross multiply
   9,764x = 20,688 × 20,688
4. Step 4: Simplify right side
   9,764x = 427,993,344
5. Step 5: Solve for x
   x = 427,993,344/9,764
6. Step 6: Final answer
   x = 43,833.81