Finding the Fourth Proportional to 2,091.44, 3,134.48 and 857.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.44 : 3,134.48 = 857.37 : x
2. Step 2: Convert to fraction form
   2,091.44/3,134.48 = 857.37/x
3. Step 3: Cross multiply
   2,091.44x = 3,134.48 × 857.37
4. Step 4: Simplify right side
   2,091.44x = 2,687,404.83
5. Step 5: Solve for x
   x = 2,687,404.83/2,091.44
6. Step 6: Final answer
   x = 1,284.95