Finding the Third Proportional to 639,742 and 1,368,068

Step by Step Solution

1. Step 1: Write the proportion equation
   639,742 : 1,368,068 = 1,368,068 : x
2. Step 2: Convert to fraction form
   639,742/1,368,068 = 1,368,068/x
3. Step 3: Cross multiply
   639,742x = 1,368,068 × 1,368,068
4. Step 4: Simplify right side
   639,742x = 1,871,610,052,624
5. Step 5: Solve for x
   x = 1,871,610,052,624/639,742
6. Step 6: Final answer
   x = 2,925,570.08