Finding the Fourth Proportional to 3,870.36, 5,807.16 and 1,273.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.36 : 5,807.16 = 1,273.56 : x
2. Step 2: Convert to fraction form
   3,870.36/5,807.16 = 1,273.56/x
3. Step 3: Cross multiply
   3,870.36x = 5,807.16 × 1,273.56
4. Step 4: Simplify right side
   3,870.36x = 7,395,766.69
5. Step 5: Solve for x
   x = 7,395,766.69/3,870.36
6. Step 6: Final answer
   x = 1,910.87