Finding the Fourth Proportional to 3,969.38, 5,937.06 and 2,861.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,969.38 : 5,937.06 = 2,861.30 : x
2. Step 2: Convert to fraction form
   3,969.38/5,937.06 = 2,861.30/x
3. Step 3: Cross multiply
   3,969.38x = 5,937.06 × 2,861.30
4. Step 4: Simplify right side
   3,969.38x = 16,987,709.78
5. Step 5: Solve for x
   x = 16,987,709.78/3,969.38
6. Step 6: Final answer
   x = 4,279.69