Finding the Third Proportional to 278,918 and 443,244

Step by Step Solution

1. Step 1: Write the proportion equation
   278,918 : 443,244 = 443,244 : x
2. Step 2: Convert to fraction form
   278,918/443,244 = 443,244/x
3. Step 3: Cross multiply
   278,918x = 443,244 × 443,244
4. Step 4: Simplify right side
   278,918x = 196,465,243,536
5. Step 5: Solve for x
   x = 196,465,243,536/278,918
6. Step 6: Final answer
   x = 704,383.52