Finding the Fourth Proportional to 8,785.69, 13,180.35 and 3,591.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,785.69 : 13,180.35 = 3,591.56 : x
2. Step 2: Convert to fraction form
   8,785.69/13,180.35 = 3,591.56/x
3. Step 3: Cross multiply
   8,785.69x = 13,180.35 × 3,591.56
4. Step 4: Simplify right side
   8,785.69x = 47,338,064.27
5. Step 5: Solve for x
   x = 47,338,064.27/8,785.69
6. Step 6: Final answer
   x = 5,388.09