Finding the Third Proportional to 668,980 and 1,441,640

Step by Step Solution

1. Step 1: Write the proportion equation
   668,980 : 1,441,640 = 1,441,640 : x
2. Step 2: Convert to fraction form
   668,980/1,441,640 = 1,441,640/x
3. Step 3: Cross multiply
   668,980x = 1,441,640 × 1,441,640
4. Step 4: Simplify right side
   668,980x = 2,078,325,889,600
5. Step 5: Solve for x
   x = 2,078,325,889,600/668,980
6. Step 6: Final answer
   x = 3,106,708.56