Finding the Fourth Proportional to 1,413.55, 1,951.59 and 909.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.55 : 1,951.59 = 909.63 : x
2. Step 2: Convert to fraction form
   1,413.55/1,951.59 = 909.63/x
3. Step 3: Cross multiply
   1,413.55x = 1,951.59 × 909.63
4. Step 4: Simplify right side
   1,413.55x = 1,775,228.22
5. Step 5: Solve for x
   x = 1,775,228.22/1,413.55
6. Step 6: Final answer
   x = 1,255.86