Finding the Third Proportional to 1,418,664 and 1,990,668

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418,664 : 1,990,668 = 1,990,668 : x
2. Step 2: Convert to fraction form
   1,418,664/1,990,668 = 1,990,668/x
3. Step 3: Cross multiply
   1,418,664x = 1,990,668 × 1,990,668
4. Step 4: Simplify right side
   1,418,664x = 3,962,759,086,224
5. Step 5: Solve for x
   x = 3,962,759,086,224/1,418,664
6. Step 6: Final answer
   x = 2,793,303.48