Finding the Fourth Proportional to 1,403.68, 1,934.94 and 960.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.68 : 1,934.94 = 960.21 : x
2. Step 2: Convert to fraction form
   1,403.68/1,934.94 = 960.21/x
3. Step 3: Cross multiply
   1,403.68x = 1,934.94 × 960.21
4. Step 4: Simplify right side
   1,403.68x = 1,857,939.06
5. Step 5: Solve for x
   x = 1,857,939.06/1,403.68
6. Step 6: Final answer
   x = 1,323.62