Finding the Fourth Proportional to 3,912.80, 5,399.33 and 2,234.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.80 : 5,399.33 = 2,234.34 : x
2. Step 2: Convert to fraction form
   3,912.80/5,399.33 = 2,234.34/x
3. Step 3: Cross multiply
   3,912.80x = 5,399.33 × 2,234.34
4. Step 4: Simplify right side
   3,912.80x = 12,063,927.82
5. Step 5: Solve for x
   x = 12,063,927.82/3,912.80
6. Step 6: Final answer
   x = 3,083.20