Finding the Third Proportional to 199,623 and 408,559.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,623 : 408,559.50 = 408,559.50 : x
2. Step 2: Convert to fraction form
   199,623/408,559.50 = 408,559.50/x
3. Step 3: Cross multiply
   199,623x = 408,559.50 × 408,559.50
4. Step 4: Simplify right side
   199,623x = 166,920,865,040.25
5. Step 5: Solve for x
   x = 166,920,865,040.25/199,623
6. Step 6: Final answer
   x = 836,180.53