Finding the Fourth Proportional to 8,786.55, 13,179.34 and 2,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,786.55 : 13,179.34 = 2,212.72 : x
2. Step 2: Convert to fraction form
   8,786.55/13,179.34 = 2,212.72/x
3. Step 3: Cross multiply
   8,786.55x = 13,179.34 × 2,212.72
4. Step 4: Simplify right side
   8,786.55x = 29,162,189.20
5. Step 5: Solve for x
   x = 29,162,189.20/8,786.55
6. Step 6: Final answer
   x = 3,318.96