Finding the Third Proportional to 1,028,791 and 1,387,788

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028,791 : 1,387,788 = 1,387,788 : x
2. Step 2: Convert to fraction form
   1,028,791/1,387,788 = 1,387,788/x
3. Step 3: Cross multiply
   1,028,791x = 1,387,788 × 1,387,788
4. Step 4: Simplify right side
   1,028,791x = 1,925,955,532,944
5. Step 5: Solve for x
   x = 1,925,955,532,944/1,028,791
6. Step 6: Final answer
   x = 1,872,057.14