Finding the Fourth Proportional to 2,857.47, 4,287.62 and 1,396.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,857.47 : 4,287.62 = 1,396.59 : x
2. Step 2: Convert to fraction form
   2,857.47/4,287.62 = 1,396.59/x
3. Step 3: Cross multiply
   2,857.47x = 4,287.62 × 1,396.59
4. Step 4: Simplify right side
   2,857.47x = 5,988,047.22
5. Step 5: Solve for x
   x = 5,988,047.22/2,857.47
6. Step 6: Final answer
   x = 2,095.58