Finding the Fourth Proportional to 256,826.38, 354,413.59 and 142,102.03

Step by Step Solution

1. Step 1: Write the proportion equation
   256,826.38 : 354,413.59 = 142,102.03 : x
2. Step 2: Convert to fraction form
   256,826.38/354,413.59 = 142,102.03/x
3. Step 3: Cross multiply
   256,826.38x = 354,413.59 × 142,102.03
4. Step 4: Simplify right side
   256,826.38x = 50,362,890,598.59
5. Step 5: Solve for x
   x = 50,362,890,598.59/256,826.38
6. Step 6: Final answer
   x = 196,097.03