Finding the Fourth Proportional to 2,258.72, 3,117.20 and 1,264.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.72 : 3,117.20 = 1,264.17 : x
2. Step 2: Convert to fraction form
   2,258.72/3,117.20 = 1,264.17/x
3. Step 3: Cross multiply
   2,258.72x = 3,117.20 × 1,264.17
4. Step 4: Simplify right side
   2,258.72x = 3,940,670.72
5. Step 5: Solve for x
   x = 3,940,670.72/2,258.72
6. Step 6: Final answer
   x = 1,744.65