Finding the Fourth Proportional to 2,894.27, 4,340.87 and 813.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,894.27 : 4,340.87 = 813.76 : x
2. Step 2: Convert to fraction form
   2,894.27/4,340.87 = 813.76/x
3. Step 3: Cross multiply
   2,894.27x = 4,340.87 × 813.76
4. Step 4: Simplify right side
   2,894.27x = 3,532,443.50
5. Step 5: Solve for x
   x = 3,532,443.50/2,894.27
6. Step 6: Final answer
   x = 1,220.50