Finding the Third Proportional to 776,709 and 1,661,355

Step by Step Solution

1. Step 1: Write the proportion equation
   776,709 : 1,661,355 = 1,661,355 : x
2. Step 2: Convert to fraction form
   776,709/1,661,355 = 1,661,355/x
3. Step 3: Cross multiply
   776,709x = 1,661,355 × 1,661,355
4. Step 4: Simplify right side
   776,709x = 2,760,100,436,025
5. Step 5: Solve for x
   x = 2,760,100,436,025/776,709
6. Step 6: Final answer
   x = 3,553,583.69