Finding the Fourth Proportional to 5,229.89, 7,223.75 and 3,909.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,229.89 : 7,223.75 = 3,909.59 : x
2. Step 2: Convert to fraction form
   5,229.89/7,223.75 = 3,909.59/x
3. Step 3: Cross multiply
   5,229.89x = 7,223.75 × 3,909.59
4. Step 4: Simplify right side
   5,229.89x = 28,241,845.10
5. Step 5: Solve for x
   x = 28,241,845.10/5,229.89
6. Step 6: Final answer
   x = 5,400.09