Finding the Third Proportional to 21,224.25 and 39,399.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,224.25 : 39,399.75 = 39,399.75 : x
2. Step 2: Convert to fraction form
   21,224.25/39,399.75 = 39,399.75/x
3. Step 3: Cross multiply
   21,224.25x = 39,399.75 × 39,399.75
4. Step 4: Simplify right side
   21,224.25x = 1,552,340,300.06
5. Step 5: Solve for x
   x = 1,552,340,300.06/21,224.25
6. Step 6: Final answer
   x = 73,139.94