Finding the Fourth Proportional to 2,258.51, 3,116.59 and 1,263.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,258.51 : 3,116.59 = 1,263.78 : x
2. Step 2: Convert to fraction form
   2,258.51/3,116.59 = 1,263.78/x
3. Step 3: Cross multiply
   2,258.51x = 3,116.59 × 1,263.78
4. Step 4: Simplify right side
   2,258.51x = 3,938,680.95
5. Step 5: Solve for x
   x = 3,938,680.95/2,258.51
6. Step 6: Final answer
   x = 1,743.93