Finding the Fourth Proportional to 6,607.36, 9,904.32 and 4,143.89

Step by Step Solution

1. Step 1: Write the proportion equation
   6,607.36 : 9,904.32 = 4,143.89 : x
2. Step 2: Convert to fraction form
   6,607.36/9,904.32 = 4,143.89/x
3. Step 3: Cross multiply
   6,607.36x = 9,904.32 × 4,143.89
4. Step 4: Simplify right side
   6,607.36x = 41,042,391.89
5. Step 5: Solve for x
   x = 41,042,391.89/6,607.36
6. Step 6: Final answer
   x = 6,211.62