Finding the Fourth Proportional to 2,020.35, 3,031.29 and 980.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.35 : 3,031.29 = 980.30 : x
2. Step 2: Convert to fraction form
   2,020.35/3,031.29 = 980.30/x
3. Step 3: Cross multiply
   2,020.35x = 3,031.29 × 980.30
4. Step 4: Simplify right side
   2,020.35x = 2,971,573.59
5. Step 5: Solve for x
   x = 2,971,573.59/2,020.35
6. Step 6: Final answer
   x = 1,470.82