Finding the Fourth Proportional to 7,143.59, 9,858.75 and 4,159.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,143.59 : 9,858.75 = 4,159.69 : x
2. Step 2: Convert to fraction form
   7,143.59/9,858.75 = 4,159.69/x
3. Step 3: Cross multiply
   7,143.59x = 9,858.75 × 4,159.69
4. Step 4: Simplify right side
   7,143.59x = 41,009,303.54
5. Step 5: Solve for x
   x = 41,009,303.54/7,143.59
6. Step 6: Final answer
   x = 5,740.71