Finding the Fourth Proportional to 8,574.66, 12,859.56 and 3,309.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,574.66 : 12,859.56 = 3,309.30 : x
2. Step 2: Convert to fraction form
   8,574.66/12,859.56 = 3,309.30/x
3. Step 3: Cross multiply
   8,574.66x = 12,859.56 × 3,309.30
4. Step 4: Simplify right side
   8,574.66x = 42,556,141.91
5. Step 5: Solve for x
   x = 42,556,141.91/8,574.66
6. Step 6: Final answer
   x = 4,963.01