Finding the Third Proportional to 642,574 and 1,395,764

Step by Step Solution

1. Step 1: Write the proportion equation
   642,574 : 1,395,764 = 1,395,764 : x
2. Step 2: Convert to fraction form
   642,574/1,395,764 = 1,395,764/x
3. Step 3: Cross multiply
   642,574x = 1,395,764 × 1,395,764
4. Step 4: Simplify right side
   642,574x = 1,948,157,143,696
5. Step 5: Solve for x
   x = 1,948,157,143,696/642,574
6. Step 6: Final answer
   x = 3,031,802.01