Finding the Fourth Proportional to 256,196.72, 353,551.43 and 143,019.47

Step by Step Solution

1. Step 1: Write the proportion equation
   256,196.72 : 353,551.43 = 143,019.47 : x
2. Step 2: Convert to fraction form
   256,196.72/353,551.43 = 143,019.47/x
3. Step 3: Cross multiply
   256,196.72x = 353,551.43 × 143,019.47
4. Step 4: Simplify right side
   256,196.72x = 50,564,739,377.77
5. Step 5: Solve for x
   x = 50,564,739,377.77/256,196.72
6. Step 6: Final answer
   x = 197,366.85