Finding the Fourth Proportional to 2,919.69, 4,380.15 and 945.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,919.69 : 4,380.15 = 945.48 : x
2. Step 2: Convert to fraction form
   2,919.69/4,380.15 = 945.48/x
3. Step 3: Cross multiply
   2,919.69x = 4,380.15 × 945.48
4. Step 4: Simplify right side
   2,919.69x = 4,141,344.22
5. Step 5: Solve for x
   x = 4,141,344.22/2,919.69
6. Step 6: Final answer
   x = 1,418.42