Finding the Third Proportional to 280,375.50 and 616,800

Step by Step Solution

1. Step 1: Write the proportion equation
   280,375.50 : 616,800 = 616,800 : x
2. Step 2: Convert to fraction form
   280,375.50/616,800 = 616,800/x
3. Step 3: Cross multiply
   280,375.50x = 616,800 × 616,800
4. Step 4: Simplify right side
   280,375.50x = 380,442,240,000
5. Step 5: Solve for x
   x = 380,442,240,000/280,375.50
6. Step 6: Final answer
   x = 1,356,902.58