Finding the Fourth Proportional to 3,426.42, 5,138.55 and 960.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.42 : 5,138.55 = 960.60 : x
2. Step 2: Convert to fraction form
   3,426.42/5,138.55 = 960.60/x
3. Step 3: Cross multiply
   3,426.42x = 5,138.55 × 960.60
4. Step 4: Simplify right side
   3,426.42x = 4,936,091.13
5. Step 5: Solve for x
   x = 4,936,091.13/3,426.42
6. Step 6: Final answer
   x = 1,440.60