Finding the Third Proportional to 815,674 and 1,778,804

Step by Step Solution

1. Step 1: Write the proportion equation
   815,674 : 1,778,804 = 1,778,804 : x
2. Step 2: Convert to fraction form
   815,674/1,778,804 = 1,778,804/x
3. Step 3: Cross multiply
   815,674x = 1,778,804 × 1,778,804
4. Step 4: Simplify right side
   815,674x = 3,164,143,670,416
5. Step 5: Solve for x
   x = 3,164,143,670,416/815,674
6. Step 6: Final answer
   x = 3,879,176.82