Finding the Fourth Proportional to 5,863.86, 8,786.61 and 3,518.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,863.86 : 8,786.61 = 3,518.10 : x
2. Step 2: Convert to fraction form
   5,863.86/8,786.61 = 3,518.10/x
3. Step 3: Cross multiply
   5,863.86x = 8,786.61 × 3,518.10
4. Step 4: Simplify right side
   5,863.86x = 30,912,172.64
5. Step 5: Solve for x
   x = 30,912,172.64/5,863.86
6. Step 6: Final answer
   x = 5,271.64