Finding the Fourth Proportional to 6,213.78, 8,574.57 and 3,561.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,213.78 : 8,574.57 = 3,561.12 : x
2. Step 2: Convert to fraction form
   6,213.78/8,574.57 = 3,561.12/x
3. Step 3: Cross multiply
   6,213.78x = 8,574.57 × 3,561.12
4. Step 4: Simplify right side
   6,213.78x = 30,535,072.72
5. Step 5: Solve for x
   x = 30,535,072.72/6,213.78
6. Step 6: Final answer
   x = 4,914.09