Finding the Fourth Proportional to 2,624.20, 3,936.17 and 980.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,624.20 : 3,936.17 = 980.62 : x
2. Step 2: Convert to fraction form
   2,624.20/3,936.17 = 980.62/x
3. Step 3: Cross multiply
   2,624.20x = 3,936.17 × 980.62
4. Step 4: Simplify right side
   2,624.20x = 3,859,879.64
5. Step 5: Solve for x
   x = 3,859,879.64/2,624.20
6. Step 6: Final answer
   x = 1,470.88