Finding the Third Proportional to 10,128 and 21,063

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128 : 21,063 = 21,063 : x
2. Step 2: Convert to fraction form
   10,128/21,063 = 21,063/x
3. Step 3: Cross multiply
   10,128x = 21,063 × 21,063
4. Step 4: Simplify right side
   10,128x = 443,649,969
5. Step 5: Solve for x
   x = 443,649,969/10,128
6. Step 6: Final answer
   x = 43,804.30