Finding the Fourth Proportional to 1,426.56, 1,968.24 and 960.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.56 : 1,968.24 = 960.78 : x
2. Step 2: Convert to fraction form
   1,426.56/1,968.24 = 960.78/x
3. Step 3: Cross multiply
   1,426.56x = 1,968.24 × 960.78
4. Step 4: Simplify right side
   1,426.56x = 1,891,045.63
5. Step 5: Solve for x
   x = 1,891,045.63/1,426.56
6. Step 6: Final answer
   x = 1,325.60