Finding the Fourth Proportional to 2,858.07, 4,288.47 and 1,396.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.07 : 4,288.47 = 1,396.41 : x
2. Step 2: Convert to fraction form
   2,858.07/4,288.47 = 1,396.41/x
3. Step 3: Cross multiply
   2,858.07x = 4,288.47 × 1,396.41
4. Step 4: Simplify right side
   2,858.07x = 5,988,462.39
5. Step 5: Solve for x
   x = 5,988,462.39/2,858.07
6. Step 6: Final answer
   x = 2,095.28