Finding the Third Proportional to 668,588 and 1,392,472

Step by Step Solution

1. Step 1: Write the proportion equation
   668,588 : 1,392,472 = 1,392,472 : x
2. Step 2: Convert to fraction form
   668,588/1,392,472 = 1,392,472/x
3. Step 3: Cross multiply
   668,588x = 1,392,472 × 1,392,472
4. Step 4: Simplify right side
   668,588x = 1,938,978,270,784
5. Step 5: Solve for x
   x = 1,938,978,270,784/668,588
6. Step 6: Final answer
   x = 2,900,109.29