Finding the Third Proportional to 65,936.25 and 142,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   65,936.25 : 142,139.25 = 142,139.25 : x
2. Step 2: Convert to fraction form
   65,936.25/142,139.25 = 142,139.25/x
3. Step 3: Cross multiply
   65,936.25x = 142,139.25 × 142,139.25
4. Step 4: Simplify right side
   65,936.25x = 20,203,566,390.56
5. Step 5: Solve for x
   x = 20,203,566,390.56/65,936.25
6. Step 6: Final answer
   x = 306,410.61