Finding the Third Proportional to 21,388 and 28,802

Step by Step Solution

1. Step 1: Write the proportion equation
   21,388 : 28,802 = 28,802 : x
2. Step 2: Convert to fraction form
   21,388/28,802 = 28,802/x
3. Step 3: Cross multiply
   21,388x = 28,802 × 28,802
4. Step 4: Simplify right side
   21,388x = 829,555,204
5. Step 5: Solve for x
   x = 829,555,204/21,388
6. Step 6: Final answer
   x = 38,786.01