Finding the Third Proportional to 20,286 and 30,890

Step by Step Solution

1. Step 1: Write the proportion equation
   20,286 : 30,890 = 30,890 : x
2. Step 2: Convert to fraction form
   20,286/30,890 = 30,890/x
3. Step 3: Cross multiply
   20,286x = 30,890 × 30,890
4. Step 4: Simplify right side
   20,286x = 954,192,100
5. Step 5: Solve for x
   x = 954,192,100/20,286
6. Step 6: Final answer
   x = 47,036.98