Finding the Fourth Proportional to 2,279.24, 3,419.24 and 980.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.24 : 3,419.24 = 980.72 : x
2. Step 2: Convert to fraction form
   2,279.24/3,419.24 = 980.72/x
3. Step 3: Cross multiply
   2,279.24x = 3,419.24 × 980.72
4. Step 4: Simplify right side
   2,279.24x = 3,353,317.05
5. Step 5: Solve for x
   x = 3,353,317.05/2,279.24
6. Step 6: Final answer
   x = 1,471.24