Finding the Third Proportional to 640,462 and 1,379,892

Step by Step Solution

1. Step 1: Write the proportion equation
   640,462 : 1,379,892 = 1,379,892 : x
2. Step 2: Convert to fraction form
   640,462/1,379,892 = 1,379,892/x
3. Step 3: Cross multiply
   640,462x = 1,379,892 × 1,379,892
4. Step 4: Simplify right side
   640,462x = 1,904,101,931,664
5. Step 5: Solve for x
   x = 1,904,101,931,664/640,462
6. Step 6: Final answer
   x = 2,973,013.12