Finding the Fourth Proportional to 3,421.81, 5,133.49 and 1,081.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,421.81 : 5,133.49 = 1,081.96 : x
2. Step 2: Convert to fraction form
   3,421.81/5,133.49 = 1,081.96/x
3. Step 3: Cross multiply
   3,421.81x = 5,133.49 × 1,081.96
4. Step 4: Simplify right side
   3,421.81x = 5,554,235.83
5. Step 5: Solve for x
   x = 5,554,235.83/3,421.81
6. Step 6: Final answer
   x = 1,623.18