Finding the Fourth Proportional to 2,725.28, 4,086.38 and 945.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,725.28 : 4,086.38 = 945.50 : x
2. Step 2: Convert to fraction form
   2,725.28/4,086.38 = 945.50/x
3. Step 3: Cross multiply
   2,725.28x = 4,086.38 × 945.50
4. Step 4: Simplify right side
   2,725.28x = 3,863,678.97
5. Step 5: Solve for x
   x = 3,863,678.97/2,725.28
6. Step 6: Final answer
   x = 1,417.72