Finding the Fourth Proportional to 2,028.81, 2,792.52 and 1,438.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,028.81 : 2,792.52 = 1,438.32 : x
2. Step 2: Convert to fraction form
   2,028.81/2,792.52 = 1,438.32/x
3. Step 3: Cross multiply
   2,028.81x = 2,792.52 × 1,438.32
4. Step 4: Simplify right side
   2,028.81x = 4,016,537.37
5. Step 5: Solve for x
   x = 4,016,537.37/2,028.81
6. Step 6: Final answer
   x = 1,979.75