Finding the Third Proportional to 54,067.50 and 81,040.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,067.50 : 81,040.50 = 81,040.50 : x
2. Step 2: Convert to fraction form
   54,067.50/81,040.50 = 81,040.50/x
3. Step 3: Cross multiply
   54,067.50x = 81,040.50 × 81,040.50
4. Step 4: Simplify right side
   54,067.50x = 6,567,562,640.25
5. Step 5: Solve for x
   x = 6,567,562,640.25/54,067.50
6. Step 6: Final answer
   x = 121,469.69