Finding the Fourth Proportional to 8,757.56, 13,133.72 and 3,209.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,757.56 : 13,133.72 = 3,209.60 : x
2. Step 2: Convert to fraction form
   8,757.56/13,133.72 = 3,209.60/x
3. Step 3: Cross multiply
   8,757.56x = 13,133.72 × 3,209.60
4. Step 4: Simplify right side
   8,757.56x = 42,153,987.71
5. Step 5: Solve for x
   x = 42,153,987.71/8,757.56
6. Step 6: Final answer
   x = 4,813.44