Finding the Third Proportional to 21,110 and 28,419

Step by Step Solution

1. Step 1: Write the proportion equation
   21,110 : 28,419 = 28,419 : x
2. Step 2: Convert to fraction form
   21,110/28,419 = 28,419/x
3. Step 3: Cross multiply
   21,110x = 28,419 × 28,419
4. Step 4: Simplify right side
   21,110x = 807,639,561
5. Step 5: Solve for x
   x = 807,639,561/21,110
6. Step 6: Final answer
   x = 38,258.62