Finding the Fourth Proportional to 5,222.09, 7,209.72 and 3,456.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,222.09 : 7,209.72 = 3,456.15 : x
2. Step 2: Convert to fraction form
   5,222.09/7,209.72 = 3,456.15/x
3. Step 3: Cross multiply
   5,222.09x = 7,209.72 × 3,456.15
4. Step 4: Simplify right side
   5,222.09x = 24,917,873.78
5. Step 5: Solve for x
   x = 24,917,873.78/5,222.09
6. Step 6: Final answer
   x = 4,771.63