Finding the Third Proportional to 190,719 and 280,243.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,719 : 280,243.50 = 280,243.50 : x
2. Step 2: Convert to fraction form
   190,719/280,243.50 = 280,243.50/x
3. Step 3: Cross multiply
   190,719x = 280,243.50 × 280,243.50
4. Step 4: Simplify right side
   190,719x = 78,536,419,292.25
5. Step 5: Solve for x
   x = 78,536,419,292.25/190,719
6. Step 6: Final answer
   x = 411,791.27