Finding the Third Proportional to 279,780 and 443,694

Step by Step Solution

1. Step 1: Write the proportion equation
   279,780 : 443,694 = 443,694 : x
2. Step 2: Convert to fraction form
   279,780/443,694 = 443,694/x
3. Step 3: Cross multiply
   279,780x = 443,694 × 443,694
4. Step 4: Simplify right side
   279,780x = 196,864,365,636
5. Step 5: Solve for x
   x = 196,864,365,636/279,780
6. Step 6: Final answer
   x = 703,639.88