Finding the Fourth Proportional to 6,215.80, 8,577.55 and 3,561.37

Step by Step Solution

1. Step 1: Write the proportion equation
   6,215.80 : 8,577.55 = 3,561.37 : x
2. Step 2: Convert to fraction form
   6,215.80/8,577.55 = 3,561.37/x
3. Step 3: Cross multiply
   6,215.80x = 8,577.55 × 3,561.37
4. Step 4: Simplify right side
   6,215.80x = 30,547,829.24
5. Step 5: Solve for x
   x = 30,547,829.24/6,215.80
6. Step 6: Final answer
   x = 4,914.55