Finding the Third Proportional to 10,488 and 21,831

Step by Step Solution

1. Step 1: Write the proportion equation
   10,488 : 21,831 = 21,831 : x
2. Step 2: Convert to fraction form
   10,488/21,831 = 21,831/x
3. Step 3: Cross multiply
   10,488x = 21,831 × 21,831
4. Step 4: Simplify right side
   10,488x = 476,592,561
5. Step 5: Solve for x
   x = 476,592,561/10,488
6. Step 6: Final answer
   x = 45,441.70