Finding the Third Proportional to 196,444 and 401,156

Step by Step Solution

1. Step 1: Write the proportion equation
   196,444 : 401,156 = 401,156 : x
2. Step 2: Convert to fraction form
   196,444/401,156 = 401,156/x
3. Step 3: Cross multiply
   196,444x = 401,156 × 401,156
4. Step 4: Simplify right side
   196,444x = 160,926,136,336
5. Step 5: Solve for x
   x = 160,926,136,336/196,444
6. Step 6: Final answer
   x = 819,195.99