Finding the Third Proportional to 1,118,644 and 1,678,086

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118,644 : 1,678,086 = 1,678,086 : x
2. Step 2: Convert to fraction form
   1,118,644/1,678,086 = 1,678,086/x
3. Step 3: Cross multiply
   1,118,644x = 1,678,086 × 1,678,086
4. Step 4: Simplify right side
   1,118,644x = 2,815,972,623,396
5. Step 5: Solve for x
   x = 2,815,972,623,396/1,118,644
6. Step 6: Final answer
   x = 2,517,309.01