Finding the Third Proportional to 21,570 and 28,988

Step by Step Solution

1. Step 1: Write the proportion equation
   21,570 : 28,988 = 28,988 : x
2. Step 2: Convert to fraction form
   21,570/28,988 = 28,988/x
3. Step 3: Cross multiply
   21,570x = 28,988 × 28,988
4. Step 4: Simplify right side
   21,570x = 840,304,144
5. Step 5: Solve for x
   x = 840,304,144/21,570
6. Step 6: Final answer
   x = 38,957.08