Finding the Third Proportional to 639,715 and 1,368,004

Step by Step Solution

1. Step 1: Write the proportion equation
   639,715 : 1,368,004 = 1,368,004 : x
2. Step 2: Convert to fraction form
   639,715/1,368,004 = 1,368,004/x
3. Step 3: Cross multiply
   639,715x = 1,368,004 × 1,368,004
4. Step 4: Simplify right side
   639,715x = 1,871,434,944,016
5. Step 5: Solve for x
   x = 1,871,434,944,016/639,715
6. Step 6: Final answer
   x = 2,925,419.83