Finding the Third Proportional to 640,134 and 1,395,468

Step by Step Solution

1. Step 1: Write the proportion equation
   640,134 : 1,395,468 = 1,395,468 : x
2. Step 2: Convert to fraction form
   640,134/1,395,468 = 1,395,468/x
3. Step 3: Cross multiply
   640,134x = 1,395,468 × 1,395,468
4. Step 4: Simplify right side
   640,134x = 1,947,330,939,024
5. Step 5: Solve for x
   x = 1,947,330,939,024/640,134
6. Step 6: Final answer
   x = 3,042,067.66