Finding the Fourth Proportional to 6,643.80, 9,168.29 and 3,812.83

Step by Step Solution

1. Step 1: Write the proportion equation
   6,643.80 : 9,168.29 = 3,812.83 : x
2. Step 2: Convert to fraction form
   6,643.80/9,168.29 = 3,812.83/x
3. Step 3: Cross multiply
   6,643.80x = 9,168.29 × 3,812.83
4. Step 4: Simplify right side
   6,643.80x = 34,957,103.47
5. Step 5: Solve for x
   x = 34,957,103.47/6,643.80
6. Step 6: Final answer
   x = 5,261.61