Finding the Third Proportional to 198,042 and 412,404

Step by Step Solution

1. Step 1: Write the proportion equation
   198,042 : 412,404 = 412,404 : x
2. Step 2: Convert to fraction form
   198,042/412,404 = 412,404/x
3. Step 3: Cross multiply
   198,042x = 412,404 × 412,404
4. Step 4: Simplify right side
   198,042x = 170,077,059,216
5. Step 5: Solve for x
   x = 170,077,059,216/198,042
6. Step 6: Final answer
   x = 858,792.88