Finding the Fourth Proportional to 6,276.07, 8,661.04 and 3,919.57

Step by Step Solution

1. Step 1: Write the proportion equation
   6,276.07 : 8,661.04 = 3,919.57 : x
2. Step 2: Convert to fraction form
   6,276.07/8,661.04 = 3,919.57/x
3. Step 3: Cross multiply
   6,276.07x = 8,661.04 × 3,919.57
4. Step 4: Simplify right side
   6,276.07x = 33,947,552.55
5. Step 5: Solve for x
   x = 33,947,552.55/6,276.07
6. Step 6: Final answer
   x = 5,409.05