Finding the Third Proportional to 21,393 and 28,392

Step by Step Solution

1. Step 1: Write the proportion equation
   21,393 : 28,392 = 28,392 : x
2. Step 2: Convert to fraction form
   21,393/28,392 = 28,392/x
3. Step 3: Cross multiply
   21,393x = 28,392 × 28,392
4. Step 4: Simplify right side
   21,393x = 806,105,664
5. Step 5: Solve for x
   x = 806,105,664/21,393
6. Step 6: Final answer
   x = 37,680.81