Finding the Third Proportional to 10,548 and 21,399

Step by Step Solution

1. Step 1: Write the proportion equation
   10,548 : 21,399 = 21,399 : x
2. Step 2: Convert to fraction form
   10,548/21,399 = 21,399/x
3. Step 3: Cross multiply
   10,548x = 21,399 × 21,399
4. Step 4: Simplify right side
   10,548x = 457,917,201
5. Step 5: Solve for x
   x = 457,917,201/10,548
6. Step 6: Final answer
   x = 43,412.70