Finding the Third Proportional to 774,778 and 1,686,796

Step by Step Solution

1. Step 1: Write the proportion equation
   774,778 : 1,686,796 = 1,686,796 : x
2. Step 2: Convert to fraction form
   774,778/1,686,796 = 1,686,796/x
3. Step 3: Cross multiply
   774,778x = 1,686,796 × 1,686,796
4. Step 4: Simplify right side
   774,778x = 2,845,280,745,616
5. Step 5: Solve for x
   x = 2,845,280,745,616/774,778
6. Step 6: Final answer
   x = 3,672,381.95