Finding the Third Proportional to 639,697.50 and 1,367,968.50

Step by Step Solution

1. Step 1: Write the proportion equation
   639,697.50 : 1,367,968.50 = 1,367,968.50 : x
2. Step 2: Convert to fraction form
   639,697.50/1,367,968.50 = 1,367,968.50/x
3. Step 3: Cross multiply
   639,697.50x = 1,367,968.50 × 1,367,968.50
4. Step 4: Simplify right side
   639,697.50x = 1,871,337,816,992.25
5. Step 5: Solve for x
   x = 1,871,337,816,992.25/639,697.50
6. Step 6: Final answer
   x = 2,925,348.02