Finding the Third Proportional to 199,608 and 408,529.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,608 : 408,529.50 = 408,529.50 : x
2. Step 2: Convert to fraction form
   199,608/408,529.50 = 408,529.50/x
3. Step 3: Cross multiply
   199,608x = 408,529.50 × 408,529.50
4. Step 4: Simplify right side
   199,608x = 166,896,352,370.25
5. Step 5: Solve for x
   x = 166,896,352,370.25/199,608
6. Step 6: Final answer
   x = 836,120.56