Finding the Third Proportional to 399,093 and 619,628

Step by Step Solution

1. Step 1: Write the proportion equation
   399,093 : 619,628 = 619,628 : x
2. Step 2: Convert to fraction form
   399,093/619,628 = 619,628/x
3. Step 3: Cross multiply
   399,093x = 619,628 × 619,628
4. Step 4: Simplify right side
   399,093x = 383,938,858,384
5. Step 5: Solve for x
   x = 383,938,858,384/399,093
6. Step 6: Final answer
   x = 962,028.55