Finding the Fourth Proportional to 258,007.62, 356,059.52 and 143,288.18

Step by Step Solution

1. Step 1: Write the proportion equation
   258,007.62 : 356,059.52 = 143,288.18 : x
2. Step 2: Convert to fraction form
   258,007.62/356,059.52 = 143,288.18/x
3. Step 3: Cross multiply
   258,007.62x = 356,059.52 × 143,288.18
4. Step 4: Simplify right side
   258,007.62x = 51,019,120,592.47
5. Step 5: Solve for x
   x = 51,019,120,592.47/258,007.62
6. Step 6: Final answer
   x = 197,742.69