Finding the Fourth Proportional to 3,500.72, 4,830.81 and 1,928.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,500.72 : 4,830.81 = 1,928.78 : x
2. Step 2: Convert to fraction form
   3,500.72/4,830.81 = 1,928.78/x
3. Step 3: Cross multiply
   3,500.72x = 4,830.81 × 1,928.78
4. Step 4: Simplify right side
   3,500.72x = 9,317,545.56
5. Step 5: Solve for x
   x = 9,317,545.56/3,500.72
6. Step 6: Final answer
   x = 2,661.61