Finding the Fourth Proportional to 2,268.57, 3,128.71 and 1,916.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,268.57 : 3,128.71 = 1,916.22 : x
2. Step 2: Convert to fraction form
   2,268.57/3,128.71 = 1,916.22/x
3. Step 3: Cross multiply
   2,268.57x = 3,128.71 × 1,916.22
4. Step 4: Simplify right side
   2,268.57x = 5,995,296.68
5. Step 5: Solve for x
   x = 5,995,296.68/2,268.57
6. Step 6: Final answer
   x = 2,642.76