Finding the Fourth Proportional to 2,020.85, 3,031.86 and 722.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.85 : 3,031.86 = 722.42 : x
2. Step 2: Convert to fraction form
   2,020.85/3,031.86 = 722.42/x
3. Step 3: Cross multiply
   2,020.85x = 3,031.86 × 722.42
4. Step 4: Simplify right side
   2,020.85x = 2,190,276.30
5. Step 5: Solve for x
   x = 2,190,276.30/2,020.85
6. Step 6: Final answer
   x = 1,083.84