Finding the Fourth Proportional to 2,020.23, 3,024.27 and 1,288.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.23 : 3,024.27 = 1,288.80 : x
2. Step 2: Convert to fraction form
   2,020.23/3,024.27 = 1,288.80/x
3. Step 3: Cross multiply
   2,020.23x = 3,024.27 × 1,288.80
4. Step 4: Simplify right side
   2,020.23x = 3,897,679.18
5. Step 5: Solve for x
   x = 3,897,679.18/2,020.23
6. Step 6: Final answer
   x = 1,929.32