Finding the Fourth Proportional to 1,939.79, 2,676.92 and 1,055.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.79 : 2,676.92 = 1,055.59 : x
2. Step 2: Convert to fraction form
   1,939.79/2,676.92 = 1,055.59/x
3. Step 3: Cross multiply
   1,939.79x = 2,676.92 × 1,055.59
4. Step 4: Simplify right side
   1,939.79x = 2,825,729.31
5. Step 5: Solve for x
   x = 2,825,729.31/1,939.79
6. Step 6: Final answer
   x = 1,456.72