Finding the Fourth Proportional to 256,514.82, 353,989.89 and 143,337.57

Step by Step Solution

1. Step 1: Write the proportion equation
   256,514.82 : 353,989.89 = 143,337.57 : x
2. Step 2: Convert to fraction form
   256,514.82/353,989.89 = 143,337.57/x
3. Step 3: Cross multiply
   256,514.82x = 353,989.89 × 143,337.57
4. Step 4: Simplify right side
   256,514.82x = 50,740,050,637.17
5. Step 5: Solve for x
   x = 50,740,050,637.17/256,514.82
6. Step 6: Final answer
   x = 197,805.53