Finding the Fourth Proportional to 1,361.61, 1,879.07 and 963.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.61 : 1,879.07 = 963.99 : x
2. Step 2: Convert to fraction form
   1,361.61/1,879.07 = 963.99/x
3. Step 3: Cross multiply
   1,361.61x = 1,879.07 × 963.99
4. Step 4: Simplify right side
   1,361.61x = 1,811,399.87
5. Step 5: Solve for x
   x = 1,811,399.87/1,361.61
6. Step 6: Final answer
   x = 1,330.34