Finding the Fourth Proportional to 2,021.94, 3,028.52 and 1,239.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.94 : 3,028.52 = 1,239.57 : x
2. Step 2: Convert to fraction form
   2,021.94/3,028.52 = 1,239.57/x
3. Step 3: Cross multiply
   2,021.94x = 3,028.52 × 1,239.57
4. Step 4: Simplify right side
   2,021.94x = 3,754,056.34
5. Step 5: Solve for x
   x = 3,754,056.34/2,021.94
6. Step 6: Final answer
   x = 1,856.66