Finding the Third Proportional to 414,856.50 and 619,638

Step by Step Solution

1. Step 1: Write the proportion equation
   414,856.50 : 619,638 = 619,638 : x
2. Step 2: Convert to fraction form
   414,856.50/619,638 = 619,638/x
3. Step 3: Cross multiply
   414,856.50x = 619,638 × 619,638
4. Step 4: Simplify right side
   414,856.50x = 383,951,251,044
5. Step 5: Solve for x
   x = 383,951,251,044/414,856.50
6. Step 6: Final answer
   x = 925,503.76