Finding the Third Proportional to 668,435 and 1,443,406

Step by Step Solution

1. Step 1: Write the proportion equation
   668,435 : 1,443,406 = 1,443,406 : x
2. Step 2: Convert to fraction form
   668,435/1,443,406 = 1,443,406/x
3. Step 3: Cross multiply
   668,435x = 1,443,406 × 1,443,406
4. Step 4: Simplify right side
   668,435x = 2,083,420,880,836
5. Step 5: Solve for x
   x = 2,083,420,880,836/668,435
6. Step 6: Final answer
   x = 3,116,863.84