Finding the Fourth Proportional to 3,912.87, 5,870.18 and 1,447.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.87 : 5,870.18 = 1,447.69 : x
2. Step 2: Convert to fraction form
   3,912.87/5,870.18 = 1,447.69/x
3. Step 3: Cross multiply
   3,912.87x = 5,870.18 × 1,447.69
4. Step 4: Simplify right side
   3,912.87x = 8,498,200.88
5. Step 5: Solve for x
   x = 8,498,200.88/3,912.87
6. Step 6: Final answer
   x = 2,171.86