Finding the Fourth Proportional to 2,185.54, 3,273.39 and 1,258.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.54 : 3,273.39 = 1,258.90 : x
2. Step 2: Convert to fraction form
   2,185.54/3,273.39 = 1,258.90/x
3. Step 3: Cross multiply
   2,185.54x = 3,273.39 × 1,258.90
4. Step 4: Simplify right side
   2,185.54x = 4,120,870.67
5. Step 5: Solve for x
   x = 4,120,870.67/2,185.54
6. Step 6: Final answer
   x = 1,885.52