Finding the Third Proportional to 640,994 and 1,367,785

Step by Step Solution

1. Step 1: Write the proportion equation
   640,994 : 1,367,785 = 1,367,785 : x
2. Step 2: Convert to fraction form
   640,994/1,367,785 = 1,367,785/x
3. Step 3: Cross multiply
   640,994x = 1,367,785 × 1,367,785
4. Step 4: Simplify right side
   640,994x = 1,870,835,806,225
5. Step 5: Solve for x
   x = 1,870,835,806,225/640,994
6. Step 6: Final answer
   x = 2,918,647.92