Finding the Fourth Proportional to 3,919.79, 5,870.37 and 2,162.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.79 : 5,870.37 = 2,162.09 : x
2. Step 2: Convert to fraction form
   3,919.79/5,870.37 = 2,162.09/x
3. Step 3: Cross multiply
   3,919.79x = 5,870.37 × 2,162.09
4. Step 4: Simplify right side
   3,919.79x = 12,692,268.27
5. Step 5: Solve for x
   x = 12,692,268.27/3,919.79
6. Step 6: Final answer
   x = 3,238.00