Finding the Fourth Proportional to 1,919.72, 2,880.39 and 945.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919.72 : 2,880.39 = 945.83 : x
2. Step 2: Convert to fraction form
   1,919.72/2,880.39 = 945.83/x
3. Step 3: Cross multiply
   1,919.72x = 2,880.39 × 945.83
4. Step 4: Simplify right side
   1,919.72x = 2,724,359.27
5. Step 5: Solve for x
   x = 2,724,359.27/1,919.72
6. Step 6: Final answer
   x = 1,419.14