Finding the Fourth Proportional to 2,367.72, 3,268.44 and 1,686.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,367.72 : 3,268.44 = 1,686.78 : x
2. Step 2: Convert to fraction form
   2,367.72/3,268.44 = 1,686.78/x
3. Step 3: Cross multiply
   2,367.72x = 3,268.44 × 1,686.78
4. Step 4: Simplify right side
   2,367.72x = 5,513,139.22
5. Step 5: Solve for x
   x = 5,513,139.22/2,367.72
6. Step 6: Final answer
   x = 2,328.46