Finding the Fourth Proportional to 1,817.57, 2,724.71 and 722.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,817.57 : 2,724.71 = 722.72 : x
2. Step 2: Convert to fraction form
   1,817.57/2,724.71 = 722.72/x
3. Step 3: Cross multiply
   1,817.57x = 2,724.71 × 722.72
4. Step 4: Simplify right side
   1,817.57x = 1,969,205.61
5. Step 5: Solve for x
   x = 1,969,205.61/1,817.57
6. Step 6: Final answer
   x = 1,083.43