Finding the Third Proportional to 20,124 and 31,399

Step by Step Solution

1. Step 1: Write the proportion equation
   20,124 : 31,399 = 31,399 : x
2. Step 2: Convert to fraction form
   20,124/31,399 = 31,399/x
3. Step 3: Cross multiply
   20,124x = 31,399 × 31,399
4. Step 4: Simplify right side
   20,124x = 985,897,201
5. Step 5: Solve for x
   x = 985,897,201/20,124
6. Step 6: Final answer
   x = 48,991.12