Finding the Fourth Proportional to 3,923.77, 5,409.89 and 2,874.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923.77 : 5,409.89 = 2,874.01 : x
2. Step 2: Convert to fraction form
   3,923.77/5,409.89 = 2,874.01/x
3. Step 3: Cross multiply
   3,923.77x = 5,409.89 × 2,874.01
4. Step 4: Simplify right side
   3,923.77x = 15,548,063.59
5. Step 5: Solve for x
   x = 15,548,063.59/3,923.77
6. Step 6: Final answer
   x = 3,962.53