Finding the Fourth Proportional to 3,870.61, 5,805.89 and 1,273.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.61 : 5,805.89 = 1,273.54 : x
2. Step 2: Convert to fraction form
   3,870.61/5,805.89 = 1,273.54/x
3. Step 3: Cross multiply
   3,870.61x = 5,805.89 × 1,273.54
4. Step 4: Simplify right side
   3,870.61x = 7,394,033.15
5. Step 5: Solve for x
   x = 7,394,033.15/3,870.61
6. Step 6: Final answer
   x = 1,910.30