Finding the Fourth Proportional to 6,863.58, 10,287.52 and 3,118.21

Step by Step Solution

1. Step 1: Write the proportion equation
   6,863.58 : 10,287.52 = 3,118.21 : x
2. Step 2: Convert to fraction form
   6,863.58/10,287.52 = 3,118.21/x
3. Step 3: Cross multiply
   6,863.58x = 10,287.52 × 3,118.21
4. Step 4: Simplify right side
   6,863.58x = 32,078,614.22
5. Step 5: Solve for x
   x = 32,078,614.22/6,863.58
6. Step 6: Final answer
   x = 4,673.74