Finding the Fourth Proportional to 2,111.28, 2,913 and 1,365.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.28 : 2,913 = 1,365.68 : x
2. Step 2: Convert to fraction form
   2,111.28/2,913 = 1,365.68/x
3. Step 3: Cross multiply
   2,111.28x = 2,913 × 1,365.68
4. Step 4: Simplify right side
   2,111.28x = 3,978,211.28
5. Step 5: Solve for x
   x = 3,978,211.28/2,111.28
6. Step 6: Final answer
   x = 1,884.27