Finding the Third Proportional to 1,240,828 and 1,990,818

Step by Step Solution

1. Step 1: Write the proportion equation
   1,240,828 : 1,990,818 = 1,990,818 : x
2. Step 2: Convert to fraction form
   1,240,828/1,990,818 = 1,990,818/x
3. Step 3: Cross multiply
   1,240,828x = 1,990,818 × 1,990,818
4. Step 4: Simplify right side
   1,240,828x = 3,963,356,309,124
5. Step 5: Solve for x
   x = 3,963,356,309,124/1,240,828
6. Step 6: Final answer
   x = 3,194,122.24