Finding the Fourth Proportional to 6,209.12, 8,569.20 and 3,556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,209.12 : 8,569.20 = 3,556.72 : x
2. Step 2: Convert to fraction form
   6,209.12/8,569.20 = 3,556.72/x
3. Step 3: Cross multiply
   6,209.12x = 8,569.20 × 3,556.72
4. Step 4: Simplify right side
   6,209.12x = 30,478,245.02
5. Step 5: Solve for x
   x = 30,478,245.02/6,209.12
6. Step 6: Final answer
   x = 4,908.63