Finding the Fourth Proportional to 3,061.08, 4,589.40 and 980.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.08 : 4,589.40 = 980.40 : x
2. Step 2: Convert to fraction form
   3,061.08/4,589.40 = 980.40/x
3. Step 3: Cross multiply
   3,061.08x = 4,589.40 × 980.40
4. Step 4: Simplify right side
   3,061.08x = 4,499,447.76
5. Step 5: Solve for x
   x = 4,499,447.76/3,061.08
6. Step 6: Final answer
   x = 1,469.89