Finding the Third Proportional to 61,769.25 and 86,745.75

Step by Step Solution

1. Step 1: Write the proportion equation
   61,769.25 : 86,745.75 = 86,745.75 : x
2. Step 2: Convert to fraction form
   61,769.25/86,745.75 = 86,745.75/x
3. Step 3: Cross multiply
   61,769.25x = 86,745.75 × 86,745.75
4. Step 4: Simplify right side
   61,769.25x = 7,524,825,143.06
5. Step 5: Solve for x
   x = 7,524,825,143.06/61,769.25
6. Step 6: Final answer
   x = 121,821.54