Finding the Fourth Proportional to 3,516.57, 5,275.15 and 919.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,516.57 : 5,275.15 = 919.50 : x
2. Step 2: Convert to fraction form
   3,516.57/5,275.15 = 919.50/x
3. Step 3: Cross multiply
   3,516.57x = 5,275.15 × 919.50
4. Step 4: Simplify right side
   3,516.57x = 4,850,500.43
5. Step 5: Solve for x
   x = 4,850,500.43/3,516.57
6. Step 6: Final answer
   x = 1,379.33