Finding the Fourth Proportional to 6,561.91, 9,055.50 and 3,909.41

Step by Step Solution

1. Step 1: Write the proportion equation
   6,561.91 : 9,055.50 = 3,909.41 : x
2. Step 2: Convert to fraction form
   6,561.91/9,055.50 = 3,909.41/x
3. Step 3: Cross multiply
   6,561.91x = 9,055.50 × 3,909.41
4. Step 4: Simplify right side
   6,561.91x = 35,401,687.21
5. Step 5: Solve for x
   x = 35,401,687.21/6,561.91
6. Step 6: Final answer
   x = 5,395.03