Finding the Fourth Proportional to 261,169.50, 360,413.91 and 155,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   261,169.50 : 360,413.91 = 155,185.50 : x
2. Step 2: Convert to fraction form
   261,169.50/360,413.91 = 155,185.50/x
3. Step 3: Cross multiply
   261,169.50x = 360,413.91 × 155,185.50
4. Step 4: Simplify right side
   261,169.50x = 55,931,012,830.31
5. Step 5: Solve for x
   x = 55,931,012,830.31/261,169.50
6. Step 6: Final answer
   x = 214,155.99