Finding the Third Proportional to 298,136 and 443,148

Step by Step Solution

1. Step 1: Write the proportion equation
   298,136 : 443,148 = 443,148 : x
2. Step 2: Convert to fraction form
   298,136/443,148 = 443,148/x
3. Step 3: Cross multiply
   298,136x = 443,148 × 443,148
4. Step 4: Simplify right side
   298,136x = 196,380,149,904
5. Step 5: Solve for x
   x = 196,380,149,904/298,136
6. Step 6: Final answer
   x = 658,693.18