Finding the Third Proportional to 278,814 and 443,132

Step by Step Solution

1. Step 1: Write the proportion equation
   278,814 : 443,132 = 443,132 : x
2. Step 2: Convert to fraction form
   278,814/443,132 = 443,132/x
3. Step 3: Cross multiply
   278,814x = 443,132 × 443,132
4. Step 4: Simplify right side
   278,814x = 196,365,969,424
5. Step 5: Solve for x
   x = 196,365,969,424/278,814
6. Step 6: Final answer
   x = 704,290.21