Finding the Third Proportional to 304,707 and 648,780

Step by Step Solution

1. Step 1: Write the proportion equation
   304,707 : 648,780 = 648,780 : x
2. Step 2: Convert to fraction form
   304,707/648,780 = 648,780/x
3. Step 3: Cross multiply
   304,707x = 648,780 × 648,780
4. Step 4: Simplify right side
   304,707x = 420,915,488,400
5. Step 5: Solve for x
   x = 420,915,488,400/304,707
6. Step 6: Final answer
   x = 1,381,377.81