Finding the Fourth Proportional to 3,928.50, 5,419.71 and 2,435.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928.50 : 5,419.71 = 2,435.67 : x
2. Step 2: Convert to fraction form
   3,928.50/5,419.71 = 2,435.67/x
3. Step 3: Cross multiply
   3,928.50x = 5,419.71 × 2,435.67
4. Step 4: Simplify right side
   3,928.50x = 13,200,625.06
5. Step 5: Solve for x
   x = 13,200,625.06/3,928.50
6. Step 6: Final answer
   x = 3,360.22