Finding the Fourth Proportional to 2,858.43, 4,287.59 and 910.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.43 : 4,287.59 = 910.59 : x
2. Step 2: Convert to fraction form
   2,858.43/4,287.59 = 910.59/x
3. Step 3: Cross multiply
   2,858.43x = 4,287.59 × 910.59
4. Step 4: Simplify right side
   2,858.43x = 3,904,232.03
5. Step 5: Solve for x
   x = 3,904,232.03/2,858.43
6. Step 6: Final answer
   x = 1,365.87