Finding the Fourth Proportional to 8,636, 12,955.56 and 5,716.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,636 : 12,955.56 = 5,716.72 : x
2. Step 2: Convert to fraction form
   8,636/12,955.56 = 5,716.72/x
3. Step 3: Cross multiply
   8,636x = 12,955.56 × 5,716.72
4. Step 4: Simplify right side
   8,636x = 74,063,308.96
5. Step 5: Solve for x
   x = 74,063,308.96/8,636
6. Step 6: Final answer
   x = 8,576.11