Finding the Third Proportional to 768,686 and 1,123,407

Step by Step Solution

1. Step 1: Write the proportion equation
   768,686 : 1,123,407 = 1,123,407 : x
2. Step 2: Convert to fraction form
   768,686/1,123,407 = 1,123,407/x
3. Step 3: Cross multiply
   768,686x = 1,123,407 × 1,123,407
4. Step 4: Simplify right side
   768,686x = 1,262,043,287,649
5. Step 5: Solve for x
   x = 1,262,043,287,649/768,686
6. Step 6: Final answer
   x = 1,641,819.01