Finding the Third Proportional to 1,028,790 and 1,387,786.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028,790 : 1,387,786.50 = 1,387,786.50 : x
2. Step 2: Convert to fraction form
   1,028,790/1,387,786.50 = 1,387,786.50/x
3. Step 3: Cross multiply
   1,028,790x = 1,387,786.50 × 1,387,786.50
4. Step 4: Simplify right side
   1,028,790x = 1,925,951,369,582.25
5. Step 5: Solve for x
   x = 1,925,951,369,582.25/1,028,790
6. Step 6: Final answer
   x = 1,872,054.91