Finding the Third Proportional to 1,221,678 and 1,864,116

Step by Step Solution

1. Step 1: Write the proportion equation
   1,221,678 : 1,864,116 = 1,864,116 : x
2. Step 2: Convert to fraction form
   1,221,678/1,864,116 = 1,864,116/x
3. Step 3: Cross multiply
   1,221,678x = 1,864,116 × 1,864,116
4. Step 4: Simplify right side
   1,221,678x = 3,474,928,461,456
5. Step 5: Solve for x
   x = 3,474,928,461,456/1,221,678
6. Step 6: Final answer
   x = 2,844,389.82