Finding the Third Proportional to 21,399.75 and 28,401.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,399.75 : 28,401.75 = 28,401.75 : x
2. Step 2: Convert to fraction form
   21,399.75/28,401.75 = 28,401.75/x
3. Step 3: Cross multiply
   21,399.75x = 28,401.75 × 28,401.75
4. Step 4: Simplify right side
   21,399.75x = 806,659,403.06
5. Step 5: Solve for x
   x = 806,659,403.06/21,399.75
6. Step 6: Final answer
   x = 37,694.80