Finding the Third Proportional to 16,438 and 21,957

Step by Step Solution

1. Step 1: Write the proportion equation
   16,438 : 21,957 = 21,957 : x
2. Step 2: Convert to fraction form
   16,438/21,957 = 21,957/x
3. Step 3: Cross multiply
   16,438x = 21,957 × 21,957
4. Step 4: Simplify right side
   16,438x = 482,109,849
5. Step 5: Solve for x
   x = 482,109,849/16,438
6. Step 6: Final answer
   x = 29,328.98