Finding the Fourth Proportional to 2,619.52, 3,929.34 and 863.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.52 : 3,929.34 = 863.96 : x
2. Step 2: Convert to fraction form
   2,619.52/3,929.34 = 863.96/x
3. Step 3: Cross multiply
   2,619.52x = 3,929.34 × 863.96
4. Step 4: Simplify right side
   2,619.52x = 3,394,792.59
5. Step 5: Solve for x
   x = 3,394,792.59/2,619.52
6. Step 6: Final answer
   x = 1,295.96