Finding the Third Proportional to 302,300 and 451,870

Step by Step Solution

1. Step 1: Write the proportion equation
   302,300 : 451,870 = 451,870 : x
2. Step 2: Convert to fraction form
   302,300/451,870 = 451,870/x
3. Step 3: Cross multiply
   302,300x = 451,870 × 451,870
4. Step 4: Simplify right side
   302,300x = 204,186,496,900
5. Step 5: Solve for x
   x = 204,186,496,900/302,300
6. Step 6: Final answer
   x = 675,443.26