Finding the Third Proportional to 292,874.50 and 639,452

Step by Step Solution

1. Step 1: Write the proportion equation
   292,874.50 : 639,452 = 639,452 : x
2. Step 2: Convert to fraction form
   292,874.50/639,452 = 639,452/x
3. Step 3: Cross multiply
   292,874.50x = 639,452 × 639,452
4. Step 4: Simplify right side
   292,874.50x = 408,898,860,304
5. Step 5: Solve for x
   x = 408,898,860,304/292,874.50
6. Step 6: Final answer
   x = 1,396,157.26