Finding the Fourth Proportional to 6,212.15, 8,572.76 and 3,561.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,212.15 : 8,572.76 = 3,561.10 : x
2. Step 2: Convert to fraction form
   6,212.15/8,572.76 = 3,561.10/x
3. Step 3: Cross multiply
   6,212.15x = 8,572.76 × 3,561.10
4. Step 4: Simplify right side
   6,212.15x = 30,528,429.75
5. Step 5: Solve for x
   x = 30,528,429.75/6,212.15
6. Step 6: Final answer
   x = 4,914.31