Finding the Fourth Proportional to 1,025.89, 1,413.72 and 956.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.89 : 1,413.72 = 956.63 : x
2. Step 2: Convert to fraction form
   1,025.89/1,413.72 = 956.63/x
3. Step 3: Cross multiply
   1,025.89x = 1,413.72 × 956.63
4. Step 4: Simplify right side
   1,025.89x = 1,352,410.50
5. Step 5: Solve for x
   x = 1,352,410.50/1,025.89
6. Step 6: Final answer
   x = 1,318.28