Finding the Third Proportional to 774,500 and 1,686,790

Step by Step Solution

1. Step 1: Write the proportion equation
   774,500 : 1,686,790 = 1,686,790 : x
2. Step 2: Convert to fraction form
   774,500/1,686,790 = 1,686,790/x
3. Step 3: Cross multiply
   774,500x = 1,686,790 × 1,686,790
4. Step 4: Simplify right side
   774,500x = 2,845,260,504,100
5. Step 5: Solve for x
   x = 2,845,260,504,100/774,500
6. Step 6: Final answer
   x = 3,673,673.99