Finding the Fourth Proportional to 6,643.91, 9,168.63 and 3,659.81

Step by Step Solution

1. Step 1: Write the proportion equation
   6,643.91 : 9,168.63 = 3,659.81 : x
2. Step 2: Convert to fraction form
   6,643.91/9,168.63 = 3,659.81/x
3. Step 3: Cross multiply
   6,643.91x = 9,168.63 × 3,659.81
4. Step 4: Simplify right side
   6,643.91x = 33,555,443.76
5. Step 5: Solve for x
   x = 33,555,443.76/6,643.91
6. Step 6: Final answer
   x = 5,050.56