Finding the Fourth Proportional to 3,426.54, 5,139.42 and 961.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.54 : 5,139.42 = 961.56 : x
2. Step 2: Convert to fraction form
   3,426.54/5,139.42 = 961.56/x
3. Step 3: Cross multiply
   3,426.54x = 5,139.42 × 961.56
4. Step 4: Simplify right side
   3,426.54x = 4,941,860.70
5. Step 5: Solve for x
   x = 4,941,860.70/3,426.54
6. Step 6: Final answer
   x = 1,442.23