Finding the Third Proportional to 818,290 and 1,778,223

Step by Step Solution

1. Step 1: Write the proportion equation
   818,290 : 1,778,223 = 1,778,223 : x
2. Step 2: Convert to fraction form
   818,290/1,778,223 = 1,778,223/x
3. Step 3: Cross multiply
   818,290x = 1,778,223 × 1,778,223
4. Step 4: Simplify right side
   818,290x = 3,162,077,037,729
5. Step 5: Solve for x
   x = 3,162,077,037,729/818,290
6. Step 6: Final answer
   x = 3,864,249.88