Finding the Third Proportional to 20,871 and 31,300

Step by Step Solution

1. Step 1: Write the proportion equation
   20,871 : 31,300 = 31,300 : x
2. Step 2: Convert to fraction form
   20,871/31,300 = 31,300/x
3. Step 3: Cross multiply
   20,871x = 31,300 × 31,300
4. Step 4: Simplify right side
   20,871x = 979,690,000
5. Step 5: Solve for x
   x = 979,690,000/20,871
6. Step 6: Final answer
   x = 46,940.25