Finding the Fourth Proportional to 3,921.77, 5,886.20 and 3,504.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.77 : 5,886.20 = 3,504.69 : x
2. Step 2: Convert to fraction form
   3,921.77/5,886.20 = 3,504.69/x
3. Step 3: Cross multiply
   3,921.77x = 5,886.20 × 3,504.69
4. Step 4: Simplify right side
   3,921.77x = 20,629,315.04
5. Step 5: Solve for x
   x = 20,629,315.04/3,921.77
6. Step 6: Final answer
   x = 5,260.20