Finding the Third Proportional to 424,680 and 619,488

Step by Step Solution

1. Step 1: Write the proportion equation
   424,680 : 619,488 = 619,488 : x
2. Step 2: Convert to fraction form
   424,680/619,488 = 619,488/x
3. Step 3: Cross multiply
   424,680x = 619,488 × 619,488
4. Step 4: Simplify right side
   424,680x = 383,765,382,144
5. Step 5: Solve for x
   x = 383,765,382,144/424,680
6. Step 6: Final answer
   x = 903,657.77