Finding the Third Proportional to 640,130 and 1,379,404

Step by Step Solution

1. Step 1: Write the proportion equation
   640,130 : 1,379,404 = 1,379,404 : x
2. Step 2: Convert to fraction form
   640,130/1,379,404 = 1,379,404/x
3. Step 3: Cross multiply
   640,130x = 1,379,404 × 1,379,404
4. Step 4: Simplify right side
   640,130x = 1,902,755,395,216
5. Step 5: Solve for x
   x = 1,902,755,395,216/640,130
6. Step 6: Final answer
   x = 2,972,451.53