Finding the Third Proportional to 1,240,866 and 1,990,872

Step by Step Solution

1. Step 1: Write the proportion equation
   1,240,866 : 1,990,872 = 1,990,872 : x
2. Step 2: Convert to fraction form
   1,240,866/1,990,872 = 1,990,872/x
3. Step 3: Cross multiply
   1,240,866x = 1,990,872 × 1,990,872
4. Step 4: Simplify right side
   1,240,866x = 3,963,571,320,384
5. Step 5: Solve for x
   x = 3,963,571,320,384/1,240,866
6. Step 6: Final answer
   x = 3,194,197.70