Finding the Third Proportional to 17,910 and 21,204

Step by Step Solution

1. Step 1: Write the proportion equation
   17,910 : 21,204 = 21,204 : x
2. Step 2: Convert to fraction form
   17,910/21,204 = 21,204/x
3. Step 3: Cross multiply
   17,910x = 21,204 × 21,204
4. Step 4: Simplify right side
   17,910x = 449,609,616
5. Step 5: Solve for x
   x = 449,609,616/17,910
6. Step 6: Final answer
   x = 25,103.83