Finding the Fourth Proportional to 1,939.62, 2,676.56 and 1,055.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.62 : 2,676.56 = 1,055.42 : x
2. Step 2: Convert to fraction form
   1,939.62/2,676.56 = 1,055.42/x
3. Step 3: Cross multiply
   1,939.62x = 2,676.56 × 1,055.42
4. Step 4: Simplify right side
   1,939.62x = 2,824,894.96
5. Step 5: Solve for x
   x = 2,824,894.96/1,939.62
6. Step 6: Final answer
   x = 1,456.42