Finding the Fourth Proportional to 2,637.28, 3,956.33 and 905.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,637.28 : 3,956.33 = 905.50 : x
2. Step 2: Convert to fraction form
   2,637.28/3,956.33 = 905.50/x
3. Step 3: Cross multiply
   2,637.28x = 3,956.33 × 905.50
4. Step 4: Simplify right side
   2,637.28x = 3,582,456.82
5. Step 5: Solve for x
   x = 3,582,456.82/2,637.28
6. Step 6: Final answer
   x = 1,358.39