Finding the Third Proportional to 249,441 and 443,478

Step by Step Solution

1. Step 1: Write the proportion equation
   249,441 : 443,478 = 443,478 : x
2. Step 2: Convert to fraction form
   249,441/443,478 = 443,478/x
3. Step 3: Cross multiply
   249,441x = 443,478 × 443,478
4. Step 4: Simplify right side
   249,441x = 196,672,736,484
5. Step 5: Solve for x
   x = 196,672,736,484/249,441
6. Step 6: Final answer
   x = 788,453.93