Finding the Fourth Proportional to 3,912, 5,868.52 and 1,831.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912 : 5,868.52 = 1,831.72 : x
2. Step 2: Convert to fraction form
   3,912/5,868.52 = 1,831.72/x
3. Step 3: Cross multiply
   3,912x = 5,868.52 × 1,831.72
4. Step 4: Simplify right side
   3,912x = 10,749,485.45
5. Step 5: Solve for x
   x = 10,749,485.45/3,912
6. Step 6: Final answer
   x = 2,747.82