Finding the Fourth Proportional to 2,858.68, 4,288.43 and 911.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.68 : 4,288.43 = 911.04 : x
2. Step 2: Convert to fraction form
   2,858.68/4,288.43 = 911.04/x
3. Step 3: Cross multiply
   2,858.68x = 4,288.43 × 911.04
4. Step 4: Simplify right side
   2,858.68x = 3,906,931.27
5. Step 5: Solve for x
   x = 3,906,931.27/2,858.68
6. Step 6: Final answer
   x = 1,366.69