Finding the Fourth Proportional to 10,621.77, 15,928.79 and 3,956.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,621.77 : 15,928.79 = 3,956.72 : x
2. Step 2: Convert to fraction form
   10,621.77/15,928.79 = 3,956.72/x
3. Step 3: Cross multiply
   10,621.77x = 15,928.79 × 3,956.72
4. Step 4: Simplify right side
   10,621.77x = 63,025,662.54
5. Step 5: Solve for x
   x = 63,025,662.54/10,621.77
6. Step 6: Final answer
   x = 5,933.63