Finding the Third Proportional to 21,566 and 28,980

Step by Step Solution

1. Step 1: Write the proportion equation
   21,566 : 28,980 = 28,980 : x
2. Step 2: Convert to fraction form
   21,566/28,980 = 28,980/x
3. Step 3: Cross multiply
   21,566x = 28,980 × 28,980
4. Step 4: Simplify right side
   21,566x = 839,840,400
5. Step 5: Solve for x
   x = 839,840,400/21,566
6. Step 6: Final answer
   x = 38,942.80