Finding the Fourth Proportional to 1,939.55, 2,676.61 and 1,055.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.55 : 2,676.61 = 1,055.33 : x
2. Step 2: Convert to fraction form
   1,939.55/2,676.61 = 1,055.33/x
3. Step 3: Cross multiply
   1,939.55x = 2,676.61 × 1,055.33
4. Step 4: Simplify right side
   1,939.55x = 2,824,704.80
5. Step 5: Solve for x
   x = 2,824,704.80/1,939.55
6. Step 6: Final answer
   x = 1,456.37