Finding the Third Proportional to 647,343 and 1,423,170

Step by Step Solution

1. Step 1: Write the proportion equation
   647,343 : 1,423,170 = 1,423,170 : x
2. Step 2: Convert to fraction form
   647,343/1,423,170 = 1,423,170/x
3. Step 3: Cross multiply
   647,343x = 1,423,170 × 1,423,170
4. Step 4: Simplify right side
   647,343x = 2,025,412,848,900
5. Step 5: Solve for x
   x = 2,025,412,848,900/647,343
6. Step 6: Final answer
   x = 3,128,809.38