Finding the Third Proportional to 10,488 and 21,256

Step by Step Solution

1. Step 1: Write the proportion equation
   10,488 : 21,256 = 21,256 : x
2. Step 2: Convert to fraction form
   10,488/21,256 = 21,256/x
3. Step 3: Cross multiply
   10,488x = 21,256 × 21,256
4. Step 4: Simplify right side
   10,488x = 451,817,536
5. Step 5: Solve for x
   x = 451,817,536/10,488
6. Step 6: Final answer
   x = 43,079.48