Finding the Fourth Proportional to 3,928.72, 5,889.38 and 1,329.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928.72 : 5,889.38 = 1,329.84 : x
2. Step 2: Convert to fraction form
   3,928.72/5,889.38 = 1,329.84/x
3. Step 3: Cross multiply
   3,928.72x = 5,889.38 × 1,329.84
4. Step 4: Simplify right side
   3,928.72x = 7,831,933.10
5. Step 5: Solve for x
   x = 7,831,933.10/3,928.72
6. Step 6: Final answer
   x = 1,993.51