Finding the Fourth Proportional to 3,819.89, 5,271.18 and 2,118.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,819.89 : 5,271.18 = 2,118.37 : x
2. Step 2: Convert to fraction form
   3,819.89/5,271.18 = 2,118.37/x
3. Step 3: Cross multiply
   3,819.89x = 5,271.18 × 2,118.37
4. Step 4: Simplify right side
   3,819.89x = 11,166,309.58
5. Step 5: Solve for x
   x = 11,166,309.58/3,819.89
6. Step 6: Final answer
   x = 2,923.20