Finding the Fourth Proportional to 1,413.32, 1,950.28 and 783.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.32 : 1,950.28 = 783.81 : x
2. Step 2: Convert to fraction form
   1,413.32/1,950.28 = 783.81/x
3. Step 3: Cross multiply
   1,413.32x = 1,950.28 × 783.81
4. Step 4: Simplify right side
   1,413.32x = 1,528,647.01
5. Step 5: Solve for x
   x = 1,528,647.01/1,413.32
6. Step 6: Final answer
   x = 1,081.60