Finding the Fourth Proportional to 256,111.31, 353,424.32 and 141,387.49

Step by Step Solution

1. Step 1: Write the proportion equation
   256,111.31 : 353,424.32 = 141,387.49 : x
2. Step 2: Convert to fraction form
   256,111.31/353,424.32 = 141,387.49/x
3. Step 3: Cross multiply
   256,111.31x = 353,424.32 × 141,387.49
4. Step 4: Simplify right side
   256,111.31x = 49,969,777,509.76
5. Step 5: Solve for x
   x = 49,969,777,509.76/256,111.31
6. Step 6: Final answer
   x = 195,109.61