Finding the Fourth Proportional to 2,613.78, 3,918.78 and 1,297.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.78 : 3,918.78 = 1,297.26 : x
2. Step 2: Convert to fraction form
   2,613.78/3,918.78 = 1,297.26/x
3. Step 3: Cross multiply
   2,613.78x = 3,918.78 × 1,297.26
4. Step 4: Simplify right side
   2,613.78x = 5,083,676.54
5. Step 5: Solve for x
   x = 5,083,676.54/2,613.78
6. Step 6: Final answer
   x = 1,944.95