Finding the Third Proportional to 815,676 and 1,778,808

Step by Step Solution

1. Step 1: Write the proportion equation
   815,676 : 1,778,808 = 1,778,808 : x
2. Step 2: Convert to fraction form
   815,676/1,778,808 = 1,778,808/x
3. Step 3: Cross multiply
   815,676x = 1,778,808 × 1,778,808
4. Step 4: Simplify right side
   815,676x = 3,164,157,900,864
5. Step 5: Solve for x
   x = 3,164,157,900,864/815,676
6. Step 6: Final answer
   x = 3,879,184.75