Finding the Third Proportional to 20,781 and 31,087

Step by Step Solution

1. Step 1: Write the proportion equation
   20,781 : 31,087 = 31,087 : x
2. Step 2: Convert to fraction form
   20,781/31,087 = 31,087/x
3. Step 3: Cross multiply
   20,781x = 31,087 × 31,087
4. Step 4: Simplify right side
   20,781x = 966,401,569
5. Step 5: Solve for x
   x = 966,401,569/20,781
6. Step 6: Final answer
   x = 46,504.09