Finding the Fourth Proportional to 3,928.42, 5,891.41 and 1,330.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928.42 : 5,891.41 = 1,330.75 : x
2. Step 2: Convert to fraction form
   3,928.42/5,891.41 = 1,330.75/x
3. Step 3: Cross multiply
   3,928.42x = 5,891.41 × 1,330.75
4. Step 4: Simplify right side
   3,928.42x = 7,839,993.86
5. Step 5: Solve for x
   x = 7,839,993.86/3,928.42
6. Step 6: Final answer
   x = 1,995.71