Finding the Fourth Proportional to 2,619.15, 3,927.76 and 863.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.15 : 3,927.76 = 863.82 : x
2. Step 2: Convert to fraction form
   2,619.15/3,927.76 = 863.82/x
3. Step 3: Cross multiply
   2,619.15x = 3,927.76 × 863.82
4. Step 4: Simplify right side
   2,619.15x = 3,392,884.91
5. Step 5: Solve for x
   x = 3,392,884.91/2,619.15
6. Step 6: Final answer
   x = 1,295.42