Finding the Fourth Proportional to 3,518.30, 4,859.39 and 2,812.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,518.30 : 4,859.39 = 2,812.59 : x
2. Step 2: Convert to fraction form
   3,518.30/4,859.39 = 2,812.59/x
3. Step 3: Cross multiply
   3,518.30x = 4,859.39 × 2,812.59
4. Step 4: Simplify right side
   3,518.30x = 13,667,471.72
5. Step 5: Solve for x
   x = 13,667,471.72/3,518.30
6. Step 6: Final answer
   x = 3,884.68