Finding the Fourth Proportional to 2,259.57, 3,117.85 and 1,264.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.57 : 3,117.85 = 1,264.89 : x
2. Step 2: Convert to fraction form
   2,259.57/3,117.85 = 1,264.89/x
3. Step 3: Cross multiply
   2,259.57x = 3,117.85 × 1,264.89
4. Step 4: Simplify right side
   2,259.57x = 3,943,734.12
5. Step 5: Solve for x
   x = 3,943,734.12/2,259.57
6. Step 6: Final answer
   x = 1,745.35