Finding the Fourth Proportional to 1,609.46, 2,413.41 and 786.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,609.46 : 2,413.41 = 786.77 : x
2. Step 2: Convert to fraction form
   1,609.46/2,413.41 = 786.77/x
3. Step 3: Cross multiply
   1,609.46x = 2,413.41 × 786.77
4. Step 4: Simplify right side
   1,609.46x = 1,898,786.52
5. Step 5: Solve for x
   x = 1,898,786.52/1,609.46
6. Step 6: Final answer
   x = 1,179.77