Finding the Third Proportional to 200,406 and 300,056

Step by Step Solution

1. Step 1: Write the proportion equation
   200,406 : 300,056 = 300,056 : x
2. Step 2: Convert to fraction form
   200,406/300,056 = 300,056/x
3. Step 3: Cross multiply
   200,406x = 300,056 × 300,056
4. Step 4: Simplify right side
   200,406x = 90,033,603,136
5. Step 5: Solve for x
   x = 90,033,603,136/200,406
6. Step 6: Final answer
   x = 449,256.03