Finding the Fourth Proportional to 5,178.89, 7,147.04 and 2,940.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178.89 : 7,147.04 = 2,940.69 : x
2. Step 2: Convert to fraction form
   5,178.89/7,147.04 = 2,940.69/x
3. Step 3: Cross multiply
   5,178.89x = 7,147.04 × 2,940.69
4. Step 4: Simplify right side
   5,178.89x = 21,017,178.62
5. Step 5: Solve for x
   x = 21,017,178.62/5,178.89
6. Step 6: Final answer
   x = 4,058.24