Finding the Fourth Proportional to 2,863.98, 4,295.37 and 811.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,863.98 : 4,295.37 = 811.50 : x
2. Step 2: Convert to fraction form
   2,863.98/4,295.37 = 811.50/x
3. Step 3: Cross multiply
   2,863.98x = 4,295.37 × 811.50
4. Step 4: Simplify right side
   2,863.98x = 3,485,692.76
5. Step 5: Solve for x
   x = 3,485,692.76/2,863.98
6. Step 6: Final answer
   x = 1,217.08