Finding the Fourth Proportional to 5,209.89, 7,187.71 and 3,321.04

Step by Step Solution

1. Step 1: Write the proportion equation
   5,209.89 : 7,187.71 = 3,321.04 : x
2. Step 2: Convert to fraction form
   5,209.89/7,187.71 = 3,321.04/x
3. Step 3: Cross multiply
   5,209.89x = 7,187.71 × 3,321.04
4. Step 4: Simplify right side
   5,209.89x = 23,870,646.15
5. Step 5: Solve for x
   x = 23,870,646.15/5,209.89
6. Step 6: Final answer
   x = 4,581.79