Finding the Third Proportional to 646,676 and 1,360,344

Step by Step Solution

1. Step 1: Write the proportion equation
   646,676 : 1,360,344 = 1,360,344 : x
2. Step 2: Convert to fraction form
   646,676/1,360,344 = 1,360,344/x
3. Step 3: Cross multiply
   646,676x = 1,360,344 × 1,360,344
4. Step 4: Simplify right side
   646,676x = 1,850,535,798,336
5. Step 5: Solve for x
   x = 1,850,535,798,336/646,676
6. Step 6: Final answer
   x = 2,861,611.99