Finding the Fourth Proportional to 2,078.57, 2,868.44 and 1,147.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.57 : 2,868.44 = 1,147.07 : x
2. Step 2: Convert to fraction form
   2,078.57/2,868.44 = 1,147.07/x
3. Step 3: Cross multiply
   2,078.57x = 2,868.44 × 1,147.07
4. Step 4: Simplify right side
   2,078.57x = 3,290,301.47
5. Step 5: Solve for x
   x = 3,290,301.47/2,078.57
6. Step 6: Final answer
   x = 1,582.96