Finding the Fourth Proportional to 3,518.67, 5,274.56 and 2,861.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,518.67 : 5,274.56 = 2,861.89 : x
2. Step 2: Convert to fraction form
   3,518.67/5,274.56 = 2,861.89/x
3. Step 3: Cross multiply
   3,518.67x = 5,274.56 × 2,861.89
4. Step 4: Simplify right side
   3,518.67x = 15,095,210.52
5. Step 5: Solve for x
   x = 15,095,210.52/3,518.67
6. Step 6: Final answer
   x = 4,290.03