Finding the Third Proportional to 519,686 and 1,138,678

Step by Step Solution

1. Step 1: Write the proportion equation
   519,686 : 1,138,678 = 1,138,678 : x
2. Step 2: Convert to fraction form
   519,686/1,138,678 = 1,138,678/x
3. Step 3: Cross multiply
   519,686x = 1,138,678 × 1,138,678
4. Step 4: Simplify right side
   519,686x = 1,296,587,587,684
5. Step 5: Solve for x
   x = 1,296,587,587,684/519,686
6. Step 6: Final answer
   x = 2,494,944.23