Finding the Fourth Proportional to 6,643.86, 9,168.71 and 3,659.88

Step by Step Solution

1. Step 1: Write the proportion equation
   6,643.86 : 9,168.71 = 3,659.88 : x
2. Step 2: Convert to fraction form
   6,643.86/9,168.71 = 3,659.88/x
3. Step 3: Cross multiply
   6,643.86x = 9,168.71 × 3,659.88
4. Step 4: Simplify right side
   6,643.86x = 33,556,360.06
5. Step 5: Solve for x
   x = 33,556,360.06/6,643.86
6. Step 6: Final answer
   x = 5,050.73