Finding the Third Proportional to 815,122 and 1,787,707

Step by Step Solution

1. Step 1: Write the proportion equation
   815,122 : 1,787,707 = 1,787,707 : x
2. Step 2: Convert to fraction form
   815,122/1,787,707 = 1,787,707/x
3. Step 3: Cross multiply
   815,122x = 1,787,707 × 1,787,707
4. Step 4: Simplify right side
   815,122x = 3,195,896,317,849
5. Step 5: Solve for x
   x = 3,195,896,317,849/815,122
6. Step 6: Final answer
   x = 3,920,758.26