Finding the Third Proportional to 640,998 and 1,367,804

Step by Step Solution

1. Step 1: Write the proportion equation
   640,998 : 1,367,804 = 1,367,804 : x
2. Step 2: Convert to fraction form
   640,998/1,367,804 = 1,367,804/x
3. Step 3: Cross multiply
   640,998x = 1,367,804 × 1,367,804
4. Step 4: Simplify right side
   640,998x = 1,870,887,782,416
5. Step 5: Solve for x
   x = 1,870,887,782,416/640,998
6. Step 6: Final answer
   x = 2,918,710.80