Finding the Third Proportional to 20,902 and 30,685

Step by Step Solution

1. Step 1: Write the proportion equation
   20,902 : 30,685 = 30,685 : x
2. Step 2: Convert to fraction form
   20,902/30,685 = 30,685/x
3. Step 3: Cross multiply
   20,902x = 30,685 × 30,685
4. Step 4: Simplify right side
   20,902x = 941,569,225
5. Step 5: Solve for x
   x = 941,569,225/20,902
6. Step 6: Final answer
   x = 45,046.85