Finding the Third Proportional to 21,038 and 28,215

Step by Step Solution

1. Step 1: Write the proportion equation
   21,038 : 28,215 = 28,215 : x
2. Step 2: Convert to fraction form
   21,038/28,215 = 28,215/x
3. Step 3: Cross multiply
   21,038x = 28,215 × 28,215
4. Step 4: Simplify right side
   21,038x = 796,086,225
5. Step 5: Solve for x
   x = 796,086,225/21,038
6. Step 6: Final answer
   x = 37,840.39