Finding the Fourth Proportional to 256,442.31, 353,871.86 and 141,719.58

Step by Step Solution

1. Step 1: Write the proportion equation
   256,442.31 : 353,871.86 = 141,719.58 : x
2. Step 2: Convert to fraction form
   256,442.31/353,871.86 = 141,719.58/x
3. Step 3: Cross multiply
   256,442.31x = 353,871.86 × 141,719.58
4. Step 4: Simplify right side
   256,442.31x = 50,150,570,664.42
5. Step 5: Solve for x
   x = 50,150,570,664.42/256,442.31
6. Step 6: Final answer
   x = 195,562.78