Finding the Fourth Proportional to 1,413.32, 1,950.90 and 917.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.32 : 1,950.90 = 917.30 : x
2. Step 2: Convert to fraction form
   1,413.32/1,950.90 = 917.30/x
3. Step 3: Cross multiply
   1,413.32x = 1,950.90 × 917.30
4. Step 4: Simplify right side
   1,413.32x = 1,789,554.69
5. Step 5: Solve for x
   x = 1,789,554.69/1,413.32
6. Step 6: Final answer
   x = 1,266.20