Finding the Fourth Proportional to 2,020.69, 3,031.94 and 980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.69 : 3,031.94 = 980.50 : x
2. Step 2: Convert to fraction form
   2,020.69/3,031.94 = 980.50/x
3. Step 3: Cross multiply
   2,020.69x = 3,031.94 × 980.50
4. Step 4: Simplify right side
   2,020.69x = 2,972,812.04
5. Step 5: Solve for x
   x = 2,972,812.04/2,020.69
6. Step 6: Final answer
   x = 1,471.19