Finding the Third Proportional to 20,928 and 31,436

Step by Step Solution

1. Step 1: Write the proportion equation
   20,928 : 31,436 = 31,436 : x
2. Step 2: Convert to fraction form
   20,928/31,436 = 31,436/x
3. Step 3: Cross multiply
   20,928x = 31,436 × 31,436
4. Step 4: Simplify right side
   20,928x = 988,222,096
5. Step 5: Solve for x
   x = 988,222,096/20,928
6. Step 6: Final answer
   x = 47,220.09