Finding the Third Proportional to 10,425 and 21,236

Step by Step Solution

1. Step 1: Write the proportion equation
   10,425 : 21,236 = 21,236 : x
2. Step 2: Convert to fraction form
   10,425/21,236 = 21,236/x
3. Step 3: Cross multiply
   10,425x = 21,236 × 21,236
4. Step 4: Simplify right side
   10,425x = 450,967,696
5. Step 5: Solve for x
   x = 450,967,696/10,425
6. Step 6: Final answer
   x = 43,258.29