Finding the Fourth Proportional to 3,171.78, 4,758.42 and 980.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,171.78 : 4,758.42 = 980.54 : x
2. Step 2: Convert to fraction form
   3,171.78/4,758.42 = 980.54/x
3. Step 3: Cross multiply
   3,171.78x = 4,758.42 × 980.54
4. Step 4: Simplify right side
   3,171.78x = 4,665,821.15
5. Step 5: Solve for x
   x = 4,665,821.15/3,171.78
6. Step 6: Final answer
   x = 1,471.04