Finding the Third Proportional to 640,494 and 1,379,952

Step by Step Solution

1. Step 1: Write the proportion equation
   640,494 : 1,379,952 = 1,379,952 : x
2. Step 2: Convert to fraction form
   640,494/1,379,952 = 1,379,952/x
3. Step 3: Cross multiply
   640,494x = 1,379,952 × 1,379,952
4. Step 4: Simplify right side
   640,494x = 1,904,267,522,304
5. Step 5: Solve for x
   x = 1,904,267,522,304/640,494
6. Step 6: Final answer
   x = 2,973,123.12