Finding the Third Proportional to 668,586 and 1,392,468

Step by Step Solution

1. Step 1: Write the proportion equation
   668,586 : 1,392,468 = 1,392,468 : x
2. Step 2: Convert to fraction form
   668,586/1,392,468 = 1,392,468/x
3. Step 3: Cross multiply
   668,586x = 1,392,468 × 1,392,468
4. Step 4: Simplify right side
   668,586x = 1,938,967,131,024
5. Step 5: Solve for x
   x = 1,938,967,131,024/668,586
6. Step 6: Final answer
   x = 2,900,101.30