Finding the Third Proportional to 21,208 and 28,884

Step by Step Solution

1. Step 1: Write the proportion equation
   21,208 : 28,884 = 28,884 : x
2. Step 2: Convert to fraction form
   21,208/28,884 = 28,884/x
3. Step 3: Cross multiply
   21,208x = 28,884 × 28,884
4. Step 4: Simplify right side
   21,208x = 834,285,456
5. Step 5: Solve for x
   x = 834,285,456/21,208
6. Step 6: Final answer
   x = 39,338.24