Finding the Fourth Proportional to 2,253.26, 3,109.72 and 1,258.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,253.26 : 3,109.72 = 1,258.90 : x
2. Step 2: Convert to fraction form
   2,253.26/3,109.72 = 1,258.90/x
3. Step 3: Cross multiply
   2,253.26x = 3,109.72 × 1,258.90
4. Step 4: Simplify right side
   2,253.26x = 3,914,826.51
5. Step 5: Solve for x
   x = 3,914,826.51/2,253.26
6. Step 6: Final answer
   x = 1,737.41