Finding the Third Proportional to 249,445 and 443,485

Step by Step Solution

1. Step 1: Write the proportion equation
   249,445 : 443,485 = 443,485 : x
2. Step 2: Convert to fraction form
   249,445/443,485 = 443,485/x
3. Step 3: Cross multiply
   249,445x = 443,485 × 443,485
4. Step 4: Simplify right side
   249,445x = 196,678,945,225
5. Step 5: Solve for x
   x = 196,678,945,225/249,445
6. Step 6: Final answer
   x = 788,466.18