Finding the Third Proportional to 10,105 and 20,620

Step by Step Solution

1. Step 1: Write the proportion equation
   10,105 : 20,620 = 20,620 : x
2. Step 2: Convert to fraction form
   10,105/20,620 = 20,620/x
3. Step 3: Cross multiply
   10,105x = 20,620 × 20,620
4. Step 4: Simplify right side
   10,105x = 425,184,400
5. Step 5: Solve for x
   x = 425,184,400/10,105
6. Step 6: Final answer
   x = 42,076.64