Finding the Third Proportional to 128,760,780 and 279,470,616

Step by Step Solution

1. Step 1: Write the proportion equation
   128,760,780 : 279,470,616 = 279,470,616 : x
2. Step 2: Convert to fraction form
   128,760,780/279,470,616 = 279,470,616/x
3. Step 3: Cross multiply
   128,760,780x = 279,470,616 × 279,470,616
4. Step 4: Simplify right side
   128,760,780x = 78,103,825,207,419,456
5. Step 5: Solve for x
   x = 78,103,825,207,419,456/128,760,780
6. Step 6: Final answer
   x = 606,580,864.20