Finding the Third Proportional to 639,717 and 1,368,007

Step by Step Solution

1. Step 1: Write the proportion equation
   639,717 : 1,368,007 = 1,368,007 : x
2. Step 2: Convert to fraction form
   639,717/1,368,007 = 1,368,007/x
3. Step 3: Cross multiply
   639,717x = 1,368,007 × 1,368,007
4. Step 4: Simplify right side
   639,717x = 1,871,443,152,049
5. Step 5: Solve for x
   x = 1,871,443,152,049/639,717
6. Step 6: Final answer
   x = 2,925,423.51