Finding the Third Proportional to 190,399.50 and 405,252

Step by Step Solution

1. Step 1: Write the proportion equation
   190,399.50 : 405,252 = 405,252 : x
2. Step 2: Convert to fraction form
   190,399.50/405,252 = 405,252/x
3. Step 3: Cross multiply
   190,399.50x = 405,252 × 405,252
4. Step 4: Simplify right side
   190,399.50x = 164,229,183,504
5. Step 5: Solve for x
   x = 164,229,183,504/190,399.50
6. Step 6: Final answer
   x = 862,550.50