Finding the Third Proportional to 64,821.25 and 140,708

Step by Step Solution

1. Step 1: Write the proportion equation
   64,821.25 : 140,708 = 140,708 : x
2. Step 2: Convert to fraction form
   64,821.25/140,708 = 140,708/x
3. Step 3: Cross multiply
   64,821.25x = 140,708 × 140,708
4. Step 4: Simplify right side
   64,821.25x = 19,798,741,264
5. Step 5: Solve for x
   x = 19,798,741,264/64,821.25
6. Step 6: Final answer
   x = 305,435.97