Finding the Fourth Proportional to 2,259.51, 3,117.97 and 1,264.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.51 : 3,117.97 = 1,264.78 : x
2. Step 2: Convert to fraction form
   2,259.51/3,117.97 = 1,264.78/x
3. Step 3: Cross multiply
   2,259.51x = 3,117.97 × 1,264.78
4. Step 4: Simplify right side
   2,259.51x = 3,943,546.10
5. Step 5: Solve for x
   x = 3,943,546.10/2,259.51
6. Step 6: Final answer
   x = 1,745.31