Finding the Fourth Proportional to 8,606.85, 12,910.34 and 3,412.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,606.85 : 12,910.34 = 3,412.72 : x
2. Step 2: Convert to fraction form
   8,606.85/12,910.34 = 3,412.72/x
3. Step 3: Cross multiply
   8,606.85x = 12,910.34 × 3,412.72
4. Step 4: Simplify right side
   8,606.85x = 44,059,375.52
5. Step 5: Solve for x
   x = 44,059,375.52/8,606.85
6. Step 6: Final answer
   x = 5,119.11