Finding the Fourth Proportional to 2,817.28, 4,227.27 and 1,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,817.28 : 4,227.27 = 1,085.50 : x
2. Step 2: Convert to fraction form
   2,817.28/4,227.27 = 1,085.50/x
3. Step 3: Cross multiply
   2,817.28x = 4,227.27 × 1,085.50
4. Step 4: Simplify right side
   2,817.28x = 4,588,701.59
5. Step 5: Solve for x
   x = 4,588,701.59/2,817.28
6. Step 6: Final answer
   x = 1,628.77