Finding the Fourth Proportional to 2,279.46, 3,418.52 and 980.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.46 : 3,418.52 = 980.63 : x
2. Step 2: Convert to fraction form
   2,279.46/3,418.52 = 980.63/x
3. Step 3: Cross multiply
   2,279.46x = 3,418.52 × 980.63
4. Step 4: Simplify right side
   2,279.46x = 3,352,281.27
5. Step 5: Solve for x
   x = 3,352,281.27/2,279.46
6. Step 6: Final answer
   x = 1,470.65