Finding the Fourth Proportional to 1,939.47, 2,676.32 and 1,142.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.47 : 2,676.32 = 1,142.86 : x
2. Step 2: Convert to fraction form
   1,939.47/2,676.32 = 1,142.86/x
3. Step 3: Cross multiply
   1,939.47x = 2,676.32 × 1,142.86
4. Step 4: Simplify right side
   1,939.47x = 3,058,659.08
5. Step 5: Solve for x
   x = 3,058,659.08/1,939.47
6. Step 6: Final answer
   x = 1,577.06