Finding the Third Proportional to 190,726.50 and 280,250

Step by Step Solution

1. Step 1: Write the proportion equation
   190,726.50 : 280,250 = 280,250 : x
2. Step 2: Convert to fraction form
   190,726.50/280,250 = 280,250/x
3. Step 3: Cross multiply
   190,726.50x = 280,250 × 280,250
4. Step 4: Simplify right side
   190,726.50x = 78,540,062,500
5. Step 5: Solve for x
   x = 78,540,062,500/190,726.50
6. Step 6: Final answer
   x = 411,794.18