Finding the Fourth Proportional to 275.82, 413.72 and 131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   275.82 : 413.72 = 131.50 : x
2. Step 2: Convert to fraction form
   275.82/413.72 = 131.50/x
3. Step 3: Cross multiply
   275.82x = 413.72 × 131.50
4. Step 4: Simplify right side
   275.82x = 54,404.18
5. Step 5: Solve for x
   x = 54,404.18/275.82
6. Step 6: Final answer
   x = 197.25