Finding the Third Proportional to 647,792 and 1,423,120

Step by Step Solution

1. Step 1: Write the proportion equation
   647,792 : 1,423,120 = 1,423,120 : x
2. Step 2: Convert to fraction form
   647,792/1,423,120 = 1,423,120/x
3. Step 3: Cross multiply
   647,792x = 1,423,120 × 1,423,120
4. Step 4: Simplify right side
   647,792x = 2,025,270,534,400
5. Step 5: Solve for x
   x = 2,025,270,534,400/647,792
6. Step 6: Final answer
   x = 3,126,421.03