Finding the Fourth Proportional to 256,250.69, 353,647.82 and 143,095.31

Step by Step Solution

1. Step 1: Write the proportion equation
   256,250.69 : 353,647.82 = 143,095.31 : x
2. Step 2: Convert to fraction form
   256,250.69/353,647.82 = 143,095.31/x
3. Step 3: Cross multiply
   256,250.69x = 353,647.82 × 143,095.31
4. Step 4: Simplify right side
   256,250.69x = 50,605,344,433.72
5. Step 5: Solve for x
   x = 50,605,344,433.72/256,250.69
6. Step 6: Final answer
   x = 197,483.74