Finding the Fourth Proportional to 1,413.09, 1,950.18 and 815.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.09 : 1,950.18 = 815.69 : x
2. Step 2: Convert to fraction form
   1,413.09/1,950.18 = 815.69/x
3. Step 3: Cross multiply
   1,413.09x = 1,950.18 × 815.69
4. Step 4: Simplify right side
   1,413.09x = 1,590,742.32
5. Step 5: Solve for x
   x = 1,590,742.32/1,413.09
6. Step 6: Final answer
   x = 1,125.72