Finding the Fourth Proportional to 8,636.72, 12,955.89 and 3,443

Step by Step Solution

1. Step 1: Write the proportion equation
   8,636.72 : 12,955.89 = 3,443 : x
2. Step 2: Convert to fraction form
   8,636.72/12,955.89 = 3,443/x
3. Step 3: Cross multiply
   8,636.72x = 12,955.89 × 3,443
4. Step 4: Simplify right side
   8,636.72x = 44,607,129.27
5. Step 5: Solve for x
   x = 44,607,129.27/8,636.72
6. Step 6: Final answer
   x = 5,164.82