Finding the Third Proportional to 687,076.50 and 1,356,909

Step by Step Solution

1. Step 1: Write the proportion equation
   687,076.50 : 1,356,909 = 1,356,909 : x
2. Step 2: Convert to fraction form
   687,076.50/1,356,909 = 1,356,909/x
3. Step 3: Cross multiply
   687,076.50x = 1,356,909 × 1,356,909
4. Step 4: Simplify right side
   687,076.50x = 1,841,202,034,281
5. Step 5: Solve for x
   x = 1,841,202,034,281/687,076.50
6. Step 6: Final answer
   x = 2,679,762.78