Finding the Fourth Proportional to 2,259.89, 3,118.59 and 1,265.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.89 : 3,118.59 = 1,265.09 : x
2. Step 2: Convert to fraction form
   2,259.89/3,118.59 = 1,265.09/x
3. Step 3: Cross multiply
   2,259.89x = 3,118.59 × 1,265.09
4. Step 4: Simplify right side
   2,259.89x = 3,945,297.02
5. Step 5: Solve for x
   x = 3,945,297.02/2,259.89
6. Step 6: Final answer
   x = 1,745.79