Finding the Third Proportional to 774,786 and 1,686,812

Step by Step Solution

1. Step 1: Write the proportion equation
   774,786 : 1,686,812 = 1,686,812 : x
2. Step 2: Convert to fraction form
   774,786/1,686,812 = 1,686,812/x
3. Step 3: Cross multiply
   774,786x = 1,686,812 × 1,686,812
4. Step 4: Simplify right side
   774,786x = 2,845,334,723,344
5. Step 5: Solve for x
   x = 2,845,334,723,344/774,786
6. Step 6: Final answer
   x = 3,672,413.70