Finding the Third Proportional to 10,139 and 20,764

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139 : 20,764 = 20,764 : x
2. Step 2: Convert to fraction form
   10,139/20,764 = 20,764/x
3. Step 3: Cross multiply
   10,139x = 20,764 × 20,764
4. Step 4: Simplify right side
   10,139x = 431,143,696
5. Step 5: Solve for x
   x = 431,143,696/10,139
6. Step 6: Final answer
   x = 42,523.30