Finding the Third Proportional to 424,665 and 619,470

Step by Step Solution

1. Step 1: Write the proportion equation
   424,665 : 619,470 = 619,470 : x
2. Step 2: Convert to fraction form
   424,665/619,470 = 619,470/x
3. Step 3: Cross multiply
   424,665x = 619,470 × 619,470
4. Step 4: Simplify right side
   424,665x = 383,743,080,900
5. Step 5: Solve for x
   x = 383,743,080,900/424,665
6. Step 6: Final answer
   x = 903,637.17