Finding the Third Proportional to 196,452 and 401,172

Step by Step Solution

1. Step 1: Write the proportion equation
   196,452 : 401,172 = 401,172 : x
2. Step 2: Convert to fraction form
   196,452/401,172 = 401,172/x
3. Step 3: Cross multiply
   196,452x = 401,172 × 401,172
4. Step 4: Simplify right side
   196,452x = 160,938,973,584
5. Step 5: Solve for x
   x = 160,938,973,584/196,452
6. Step 6: Final answer
   x = 819,227.97