Finding the Fourth Proportional to 6,261.12, 8,639.83 and 3,608.71

Step by Step Solution

1. Step 1: Write the proportion equation
   6,261.12 : 8,639.83 = 3,608.71 : x
2. Step 2: Convert to fraction form
   6,261.12/8,639.83 = 3,608.71/x
3. Step 3: Cross multiply
   6,261.12x = 8,639.83 × 3,608.71
4. Step 4: Simplify right side
   6,261.12x = 31,178,623.83
5. Step 5: Solve for x
   x = 31,178,623.83/6,261.12
6. Step 6: Final answer
   x = 4,979.72