Finding the Fourth Proportional to 2,868.35, 4,303.89 and 1,020.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,868.35 : 4,303.89 = 1,020.80 : x
2. Step 2: Convert to fraction form
   2,868.35/4,303.89 = 1,020.80/x
3. Step 3: Cross multiply
   2,868.35x = 4,303.89 × 1,020.80
4. Step 4: Simplify right side
   2,868.35x = 4,393,389.39
5. Step 5: Solve for x
   x = 4,393,389.39/2,868.35
6. Step 6: Final answer
   x = 1,531.68