Finding the Third Proportional to 190,724.50 and 280,248

Step by Step Solution

1. Step 1: Write the proportion equation
   190,724.50 : 280,248 = 280,248 : x
2. Step 2: Convert to fraction form
   190,724.50/280,248 = 280,248/x
3. Step 3: Cross multiply
   190,724.50x = 280,248 × 280,248
4. Step 4: Simplify right side
   190,724.50x = 78,538,941,504
5. Step 5: Solve for x
   x = 78,538,941,504/190,724.50
6. Step 6: Final answer
   x = 411,792.62