Finding the Fourth Proportional to 257,849.82, 355,854.06 and 143,139.24

Step by Step Solution

1. Step 1: Write the proportion equation
   257,849.82 : 355,854.06 = 143,139.24 : x
2. Step 2: Convert to fraction form
   257,849.82/355,854.06 = 143,139.24/x
3. Step 3: Cross multiply
   257,849.82x = 355,854.06 × 143,139.24
4. Step 4: Simplify right side
   257,849.82x = 50,936,679,699.31
5. Step 5: Solve for x
   x = 50,936,679,699.31/257,849.82
6. Step 6: Final answer
   x = 197,543.98