Finding the Third Proportional to 296,024 and 639,404

Step by Step Solution

1. Step 1: Write the proportion equation
   296,024 : 639,404 = 639,404 : x
2. Step 2: Convert to fraction form
   296,024/639,404 = 639,404/x
3. Step 3: Cross multiply
   296,024x = 639,404 × 639,404
4. Step 4: Simplify right side
   296,024x = 408,837,475,216
5. Step 5: Solve for x
   x = 408,837,475,216/296,024
6. Step 6: Final answer
   x = 1,381,095.71