Finding the Third Proportional to 9,820 and 20,855

Step by Step Solution

1. Step 1: Write the proportion equation
   9,820 : 20,855 = 20,855 : x
2. Step 2: Convert to fraction form
   9,820/20,855 = 20,855/x
3. Step 3: Cross multiply
   9,820x = 20,855 × 20,855
4. Step 4: Simplify right side
   9,820x = 434,931,025
5. Step 5: Solve for x
   x = 434,931,025/9,820
6. Step 6: Final answer
   x = 44,290.33