Finding the Fourth Proportional to 1,928.73, 2,660.77 and 1,142.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.73 : 2,660.77 = 1,142.31 : x
2. Step 2: Convert to fraction form
   1,928.73/2,660.77 = 1,142.31/x
3. Step 3: Cross multiply
   1,928.73x = 2,660.77 × 1,142.31
4. Step 4: Simplify right side
   1,928.73x = 3,039,424.18
5. Step 5: Solve for x
   x = 3,039,424.18/1,928.73
6. Step 6: Final answer
   x = 1,575.87