Finding the Fourth Proportional to 2,217.67, 3,322.18 and 1,728.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.67 : 3,322.18 = 1,728.43 : x
2. Step 2: Convert to fraction form
   2,217.67/3,322.18 = 1,728.43/x
3. Step 3: Cross multiply
   2,217.67x = 3,322.18 × 1,728.43
4. Step 4: Simplify right side
   2,217.67x = 5,742,155.58
5. Step 5: Solve for x
   x = 5,742,155.58/2,217.67
6. Step 6: Final answer
   x = 2,589.27