Finding the Fourth Proportional to 2,817.59, 4,224.63 and 1,085.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,817.59 : 4,224.63 = 1,085.81 : x
2. Step 2: Convert to fraction form
   2,817.59/4,224.63 = 1,085.81/x
3. Step 3: Cross multiply
   2,817.59x = 4,224.63 × 1,085.81
4. Step 4: Simplify right side
   2,817.59x = 4,587,145.50
5. Step 5: Solve for x
   x = 4,587,145.50/2,817.59
6. Step 6: Final answer
   x = 1,628.04