Finding the Third Proportional to 640,998.50 and 1,367,807

Step by Step Solution

1. Step 1: Write the proportion equation
   640,998.50 : 1,367,807 = 1,367,807 : x
2. Step 2: Convert to fraction form
   640,998.50/1,367,807 = 1,367,807/x
3. Step 3: Cross multiply
   640,998.50x = 1,367,807 × 1,367,807
4. Step 4: Simplify right side
   640,998.50x = 1,870,895,989,249
5. Step 5: Solve for x
   x = 1,870,895,989,249/640,998.50
6. Step 6: Final answer
   x = 2,918,721.32