Finding the Fourth Proportional to 2,259.80, 3,118.32 and 1,265

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.80 : 3,118.32 = 1,265 : x
2. Step 2: Convert to fraction form
   2,259.80/3,118.32 = 1,265/x
3. Step 3: Cross multiply
   2,259.80x = 3,118.32 × 1,265
4. Step 4: Simplify right side
   2,259.80x = 3,944,674.80
5. Step 5: Solve for x
   x = 3,944,674.80/2,259.80
6. Step 6: Final answer
   x = 1,745.59