Finding the Fourth Proportional to 190,298.72, 262,608.72 and 105,413.92

Step by Step Solution

1. Step 1: Write the proportion equation
   190,298.72 : 262,608.72 = 105,413.92 : x
2. Step 2: Convert to fraction form
   190,298.72/262,608.72 = 105,413.92/x
3. Step 3: Cross multiply
   190,298.72x = 262,608.72 × 105,413.92
4. Step 4: Simplify right side
   190,298.72x = 27,682,614,601.38
5. Step 5: Solve for x
   x = 27,682,614,601.38/190,298.72
6. Step 6: Final answer
   x = 145,469.26