Finding the Third Proportional to 249,442 and 443,480

Step by Step Solution

1. Step 1: Write the proportion equation
   249,442 : 443,480 = 443,480 : x
2. Step 2: Convert to fraction form
   249,442/443,480 = 443,480/x
3. Step 3: Cross multiply
   249,442x = 443,480 × 443,480
4. Step 4: Simplify right side
   249,442x = 196,674,510,400
5. Step 5: Solve for x
   x = 196,674,510,400/249,442
6. Step 6: Final answer
   x = 788,457.88