Finding the Fourth Proportional to 3,678.98, 5,516.67 and 1,831.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,678.98 : 5,516.67 = 1,831.15 : x
2. Step 2: Convert to fraction form
   3,678.98/5,516.67 = 1,831.15/x
3. Step 3: Cross multiply
   3,678.98x = 5,516.67 × 1,831.15
4. Step 4: Simplify right side
   3,678.98x = 10,101,836.48
5. Step 5: Solve for x
   x = 10,101,836.48/3,678.98
6. Step 6: Final answer
   x = 2,745.82