Finding the Fourth Proportional to 1,939.33, 2,676.28 and 1,055.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.33 : 2,676.28 = 1,055.15 : x
2. Step 2: Convert to fraction form
   1,939.33/2,676.28 = 1,055.15/x
3. Step 3: Cross multiply
   1,939.33x = 2,676.28 × 1,055.15
4. Step 4: Simplify right side
   1,939.33x = 2,823,863.46
5. Step 5: Solve for x
   x = 2,823,863.46/1,939.33
6. Step 6: Final answer
   x = 1,456.11