Finding the Fourth Proportional to 2,253.55, 3,109.79 and 1,258.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,253.55 : 3,109.79 = 1,258.63 : x
2. Step 2: Convert to fraction form
   2,253.55/3,109.79 = 1,258.63/x
3. Step 3: Cross multiply
   2,253.55x = 3,109.79 × 1,258.63
4. Step 4: Simplify right side
   2,253.55x = 3,914,053.15
5. Step 5: Solve for x
   x = 3,914,053.15/2,253.55
6. Step 6: Final answer
   x = 1,736.84