Finding the Fourth Proportional to 6,213.55, 8,574.73 and 3,561.11

Step by Step Solution

1. Step 1: Write the proportion equation
   6,213.55 : 8,574.73 = 3,561.11 : x
2. Step 2: Convert to fraction form
   6,213.55/8,574.73 = 3,561.11/x
3. Step 3: Cross multiply
   6,213.55x = 8,574.73 × 3,561.11
4. Step 4: Simplify right side
   6,213.55x = 30,535,569.28
5. Step 5: Solve for x
   x = 30,535,569.28/6,213.55
6. Step 6: Final answer
   x = 4,914.35