Finding the Fourth Proportional to 8,123.29, 12,179.53 and 2,928.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.29 : 12,179.53 = 2,928.49 : x
2. Step 2: Convert to fraction form
   8,123.29/12,179.53 = 2,928.49/x
3. Step 3: Cross multiply
   8,123.29x = 12,179.53 × 2,928.49
4. Step 4: Simplify right side
   8,123.29x = 35,667,633.35
5. Step 5: Solve for x
   x = 35,667,633.35/8,123.29
6. Step 6: Final answer
   x = 4,390.79