Finding the Fourth Proportional to 2,958.78, 4,432.41 and 1,311.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,958.78 : 4,432.41 = 1,311.42 : x
2. Step 2: Convert to fraction form
   2,958.78/4,432.41 = 1,311.42/x
3. Step 3: Cross multiply
   2,958.78x = 4,432.41 × 1,311.42
4. Step 4: Simplify right side
   2,958.78x = 5,812,751.12
5. Step 5: Solve for x
   x = 5,812,751.12/2,958.78
6. Step 6: Final answer
   x = 1,964.58