Finding the Fourth Proportional to 2,259.86, 3,118.61 and 1,265.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.86 : 3,118.61 = 1,265.15 : x
2. Step 2: Convert to fraction form
   2,259.86/3,118.61 = 1,265.15/x
3. Step 3: Cross multiply
   2,259.86x = 3,118.61 × 1,265.15
4. Step 4: Simplify right side
   2,259.86x = 3,945,497.01
5. Step 5: Solve for x
   x = 3,945,497.01/2,259.86
6. Step 6: Final answer
   x = 1,745.90