Finding the Fourth Proportional to 258,009.72, 356,062.24 and 143,290.16

Step by Step Solution

1. Step 1: Write the proportion equation
   258,009.72 : 356,062.24 = 143,290.16 : x
2. Step 2: Convert to fraction form
   258,009.72/356,062.24 = 143,290.16/x
3. Step 3: Cross multiply
   258,009.72x = 356,062.24 × 143,290.16
4. Step 4: Simplify right side
   258,009.72x = 51,020,215,339.56
5. Step 5: Solve for x
   x = 51,020,215,339.56/258,009.72
6. Step 6: Final answer
   x = 197,745.32