Finding the Third Proportional to 665,558 and 1,086,684

Step by Step Solution

1. Step 1: Write the proportion equation
   665,558 : 1,086,684 = 1,086,684 : x
2. Step 2: Convert to fraction form
   665,558/1,086,684 = 1,086,684/x
3. Step 3: Cross multiply
   665,558x = 1,086,684 × 1,086,684
4. Step 4: Simplify right side
   665,558x = 1,180,882,115,856
5. Step 5: Solve for x
   x = 1,180,882,115,856/665,558
6. Step 6: Final answer
   x = 1,774,273.79