Finding the Fourth Proportional to 256,830.73, 354,419.57 and 142,106.38

Step by Step Solution

1. Step 1: Write the proportion equation
   256,830.73 : 354,419.57 = 142,106.38 : x
2. Step 2: Convert to fraction form
   256,830.73/354,419.57 = 142,106.38/x
3. Step 3: Cross multiply
   256,830.73x = 354,419.57 × 142,106.38
4. Step 4: Simplify right side
   256,830.73x = 50,365,281,563.07
5. Step 5: Solve for x
   x = 50,365,281,563.07/256,830.73
6. Step 6: Final answer
   x = 196,103.02