Finding the Fourth Proportional to 8,505.69, 12,760.56 and 2,662.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,505.69 : 12,760.56 = 2,662.76 : x
2. Step 2: Convert to fraction form
   8,505.69/12,760.56 = 2,662.76/x
3. Step 3: Cross multiply
   8,505.69x = 12,760.56 × 2,662.76
4. Step 4: Simplify right side
   8,505.69x = 33,978,244.94
5. Step 5: Solve for x
   x = 33,978,244.94/8,505.69
6. Step 6: Final answer
   x = 3,994.77