Finding the Third Proportional to 647,064 and 1,405,908

Step by Step Solution

1. Step 1: Write the proportion equation
   647,064 : 1,405,908 = 1,405,908 : x
2. Step 2: Convert to fraction form
   647,064/1,405,908 = 1,405,908/x
3. Step 3: Cross multiply
   647,064x = 1,405,908 × 1,405,908
4. Step 4: Simplify right side
   647,064x = 1,976,577,304,464
5. Step 5: Solve for x
   x = 1,976,577,304,464/647,064
6. Step 6: Final answer
   x = 3,054,685.94