Finding the Fourth Proportional to 3,870.58, 5,806.71 and 1,273.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.58 : 5,806.71 = 1,273.42 : x
2. Step 2: Convert to fraction form
   3,870.58/5,806.71 = 1,273.42/x
3. Step 3: Cross multiply
   3,870.58x = 5,806.71 × 1,273.42
4. Step 4: Simplify right side
   3,870.58x = 7,394,380.65
5. Step 5: Solve for x
   x = 7,394,380.65/3,870.58
6. Step 6: Final answer
   x = 1,910.41