Finding the Fourth Proportional to 8,123.49, 12,186.32 and 2,280.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.49 : 12,186.32 = 2,280.15 : x
2. Step 2: Convert to fraction form
   8,123.49/12,186.32 = 2,280.15/x
3. Step 3: Cross multiply
   8,123.49x = 12,186.32 × 2,280.15
4. Step 4: Simplify right side
   8,123.49x = 27,786,626.15
5. Step 5: Solve for x
   x = 27,786,626.15/8,123.49
6. Step 6: Final answer
   x = 3,420.53