Finding the Fourth Proportional to 1,939.42, 2,676.45 and 1,142.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.42 : 2,676.45 = 1,142.79 : x
2. Step 2: Convert to fraction form
   1,939.42/2,676.45 = 1,142.79/x
3. Step 3: Cross multiply
   1,939.42x = 2,676.45 × 1,142.79
4. Step 4: Simplify right side
   1,939.42x = 3,058,620.30
5. Step 5: Solve for x
   x = 3,058,620.30/1,939.42
6. Step 6: Final answer
   x = 1,577.08