Finding the Fourth Proportional to 3,920.18, 5,870.24 and 2,163.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,920.18 : 5,870.24 = 2,163.23 : x
2. Step 2: Convert to fraction form
   3,920.18/5,870.24 = 2,163.23/x
3. Step 3: Cross multiply
   3,920.18x = 5,870.24 × 2,163.23
4. Step 4: Simplify right side
   3,920.18x = 12,698,667.82
5. Step 5: Solve for x
   x = 12,698,667.82/3,920.18
6. Step 6: Final answer
   x = 3,239.31