Finding the Fourth Proportional to 1,939.66, 2,676.72 and 1,055.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.66 : 2,676.72 = 1,055.50 : x
2. Step 2: Convert to fraction form
   1,939.66/2,676.72 = 1,055.50/x
3. Step 3: Cross multiply
   1,939.66x = 2,676.72 × 1,055.50
4. Step 4: Simplify right side
   1,939.66x = 2,825,277.96
5. Step 5: Solve for x
   x = 2,825,277.96/1,939.66
6. Step 6: Final answer
   x = 1,456.58