Finding the Fourth Proportional to 8,766.32, 13,145.58 and 3,218.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,766.32 : 13,145.58 = 3,218.20 : x
2. Step 2: Convert to fraction form
   8,766.32/13,145.58 = 3,218.20/x
3. Step 3: Cross multiply
   8,766.32x = 13,145.58 × 3,218.20
4. Step 4: Simplify right side
   8,766.32x = 42,305,105.56
5. Step 5: Solve for x
   x = 42,305,105.56/8,766.32
6. Step 6: Final answer
   x = 4,825.87