Finding the Fourth Proportional to 2,016.72, 3,024.55 and 905.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.72 : 3,024.55 = 905.50 : x
2. Step 2: Convert to fraction form
   2,016.72/3,024.55 = 905.50/x
3. Step 3: Cross multiply
   2,016.72x = 3,024.55 × 905.50
4. Step 4: Simplify right side
   2,016.72x = 2,738,730.03
5. Step 5: Solve for x
   x = 2,738,730.03/2,016.72
6. Step 6: Final answer
   x = 1,358.01