Finding the Third Proportional to 647,796 and 1,423,128

Step by Step Solution

1. Step 1: Write the proportion equation
   647,796 : 1,423,128 = 1,423,128 : x
2. Step 2: Convert to fraction form
   647,796/1,423,128 = 1,423,128/x
3. Step 3: Cross multiply
   647,796x = 1,423,128 × 1,423,128
4. Step 4: Simplify right side
   647,796x = 2,025,293,304,384
5. Step 5: Solve for x
   x = 2,025,293,304,384/647,796
6. Step 6: Final answer
   x = 3,126,436.88