Finding the Third Proportional to 199,450.50 and 415,728

Step by Step Solution

1. Step 1: Write the proportion equation
   199,450.50 : 415,728 = 415,728 : x
2. Step 2: Convert to fraction form
   199,450.50/415,728 = 415,728/x
3. Step 3: Cross multiply
   199,450.50x = 415,728 × 415,728
4. Step 4: Simplify right side
   199,450.50x = 172,829,769,984
5. Step 5: Solve for x
   x = 172,829,769,984/199,450.50
6. Step 6: Final answer
   x = 866,529.64