Finding the Third Proportional to 140,400 and 300,096

Step by Step Solution

1. Step 1: Write the proportion equation
   140,400 : 300,096 = 300,096 : x
2. Step 2: Convert to fraction form
   140,400/300,096 = 300,096/x
3. Step 3: Cross multiply
   140,400x = 300,096 × 300,096
4. Step 4: Simplify right side
   140,400x = 90,057,609,216
5. Step 5: Solve for x
   x = 90,057,609,216/140,400
6. Step 6: Final answer
   x = 641,435.96