Finding the Third Proportional to 647,042 and 1,405,863

Step by Step Solution

1. Step 1: Write the proportion equation
   647,042 : 1,405,863 = 1,405,863 : x
2. Step 2: Convert to fraction form
   647,042/1,405,863 = 1,405,863/x
3. Step 3: Cross multiply
   647,042x = 1,405,863 × 1,405,863
4. Step 4: Simplify right side
   647,042x = 1,976,450,774,769
5. Step 5: Solve for x
   x = 1,976,450,774,769/647,042
6. Step 6: Final answer
   x = 3,054,594.25