Finding the Third Proportional to 199,620 and 300,240

Step by Step Solution

1. Step 1: Write the proportion equation
   199,620 : 300,240 = 300,240 : x
2. Step 2: Convert to fraction form
   199,620/300,240 = 300,240/x
3. Step 3: Cross multiply
   199,620x = 300,240 × 300,240
4. Step 4: Simplify right side
   199,620x = 90,144,057,600
5. Step 5: Solve for x
   x = 90,144,057,600/199,620
6. Step 6: Final answer
   x = 451,578.29