Finding the Third Proportional to 668,978 and 1,429,540

Step by Step Solution

1. Step 1: Write the proportion equation
   668,978 : 1,429,540 = 1,429,540 : x
2. Step 2: Convert to fraction form
   668,978/1,429,540 = 1,429,540/x
3. Step 3: Cross multiply
   668,978x = 1,429,540 × 1,429,540
4. Step 4: Simplify right side
   668,978x = 2,043,584,611,600
5. Step 5: Solve for x
   x = 2,043,584,611,600/668,978
6. Step 6: Final answer
   x = 3,054,785.97