Finding the Fourth Proportional to 2,020.66, 3,031.18 and 788.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.66 : 3,031.18 = 788.17 : x
2. Step 2: Convert to fraction form
   2,020.66/3,031.18 = 788.17/x
3. Step 3: Cross multiply
   2,020.66x = 3,031.18 × 788.17
4. Step 4: Simplify right side
   2,020.66x = 2,389,085.14
5. Step 5: Solve for x
   x = 2,389,085.14/2,020.66
6. Step 6: Final answer
   x = 1,182.33