Finding the Fourth Proportional to 2,764.50, 4,145.39 and 816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,764.50 : 4,145.39 = 816.50 : x
2. Step 2: Convert to fraction form
   2,764.50/4,145.39 = 816.50/x
3. Step 3: Cross multiply
   2,764.50x = 4,145.39 × 816.50
4. Step 4: Simplify right side
   2,764.50x = 3,384,710.94
5. Step 5: Solve for x
   x = 3,384,710.94/2,764.50
6. Step 6: Final answer
   x = 1,224.35