Finding the Fourth Proportional to 8,123.49, 12,185.60 and 2,576.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.49 : 12,185.60 = 2,576.72 : x
2. Step 2: Convert to fraction form
   8,123.49/12,185.60 = 2,576.72/x
3. Step 3: Cross multiply
   8,123.49x = 12,185.60 × 2,576.72
4. Step 4: Simplify right side
   8,123.49x = 31,398,896.81
5. Step 5: Solve for x
   x = 31,398,896.81/8,123.49
6. Step 6: Final answer
   x = 3,865.20