Finding the Third Proportional to 20,123 and 30,311

Step by Step Solution

1. Step 1: Write the proportion equation
   20,123 : 30,311 = 30,311 : x
2. Step 2: Convert to fraction form
   20,123/30,311 = 30,311/x
3. Step 3: Cross multiply
   20,123x = 30,311 × 30,311
4. Step 4: Simplify right side
   20,123x = 918,756,721
5. Step 5: Solve for x
   x = 918,756,721/20,123
6. Step 6: Final answer
   x = 45,657.05