Finding the Fourth Proportional to 2,267.09, 3,128.52 and 1,258.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,267.09 : 3,128.52 = 1,258.78 : x
2. Step 2: Convert to fraction form
   2,267.09/3,128.52 = 1,258.78/x
3. Step 3: Cross multiply
   2,267.09x = 3,128.52 × 1,258.78
4. Step 4: Simplify right side
   2,267.09x = 3,938,129.64
5. Step 5: Solve for x
   x = 3,938,129.64/2,267.09
6. Step 6: Final answer
   x = 1,737.09