Finding the Third Proportional to 10,423 and 21,271

Step by Step Solution

1. Step 1: Write the proportion equation
   10,423 : 21,271 = 21,271 : x
2. Step 2: Convert to fraction form
   10,423/21,271 = 21,271/x
3. Step 3: Cross multiply
   10,423x = 21,271 × 21,271
4. Step 4: Simplify right side
   10,423x = 452,455,441
5. Step 5: Solve for x
   x = 452,455,441/10,423
6. Step 6: Final answer
   x = 43,409.33