Finding the Fourth Proportional to 3,919.04, 5,369.56 and 3,870.44

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.04 : 5,369.56 = 3,870.44 : x
2. Step 2: Convert to fraction form
   3,919.04/5,369.56 = 3,870.44/x
3. Step 3: Cross multiply
   3,919.04x = 5,369.56 × 3,870.44
4. Step 4: Simplify right side
   3,919.04x = 20,782,559.81
5. Step 5: Solve for x
   x = 20,782,559.81/3,919.04
6. Step 6: Final answer
   x = 5,302.97