Finding the Third Proportional to 21,376 and 28,530

Step by Step Solution

1. Step 1: Write the proportion equation
   21,376 : 28,530 = 28,530 : x
2. Step 2: Convert to fraction form
   21,376/28,530 = 28,530/x
3. Step 3: Cross multiply
   21,376x = 28,530 × 28,530
4. Step 4: Simplify right side
   21,376x = 813,960,900
5. Step 5: Solve for x
   x = 813,960,900/21,376
6. Step 6: Final answer
   x = 38,078.26