Finding the Fourth Proportional to 2,712.42, 4,068.72 and 863.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,712.42 : 4,068.72 = 863.58 : x
2. Step 2: Convert to fraction form
   2,712.42/4,068.72 = 863.58/x
3. Step 3: Cross multiply
   2,712.42x = 4,068.72 × 863.58
4. Step 4: Simplify right side
   2,712.42x = 3,513,665.22
5. Step 5: Solve for x
   x = 3,513,665.22/2,712.42
6. Step 6: Final answer
   x = 1,295.40