Finding the Fourth Proportional to 8,557.69, 12,843.83 and 5,042.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,557.69 : 12,843.83 = 5,042.55 : x
2. Step 2: Convert to fraction form
   8,557.69/12,843.83 = 5,042.55/x
3. Step 3: Cross multiply
   8,557.69x = 12,843.83 × 5,042.55
4. Step 4: Simplify right side
   8,557.69x = 64,765,654.97
5. Step 5: Solve for x
   x = 64,765,654.97/8,557.69
6. Step 6: Final answer
   x = 7,568.12