Finding the Third Proportional to 9,639 and 20,710.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,639 : 20,710.69 = 20,710.69 : x
2. Step 2: Convert to fraction form
   9,639/20,710.69 = 20,710.69/x
3. Step 3: Cross multiply
   9,639x = 20,710.69 × 20,710.69
4. Step 4: Simplify right side
   9,639x = 428,932,576.72
5. Step 5: Solve for x
   x = 428,932,576.72/9,639
6. Step 6: Final answer
   x = 44,499.70