Finding the Fourth Proportional to 256,550.42, 354,151.98 and 196,123.58

Step by Step Solution

1. Step 1: Write the proportion equation
   256,550.42 : 354,151.98 = 196,123.58 : x
2. Step 2: Convert to fraction form
   256,550.42/354,151.98 = 196,123.58/x
3. Step 3: Cross multiply
   256,550.42x = 354,151.98 × 196,123.58
4. Step 4: Simplify right side
   256,550.42x = 69,457,554,181.69
5. Step 5: Solve for x
   x = 69,457,554,181.69/256,550.42
6. Step 6: Final answer
   x = 270,736.47