Finding the Fourth Proportional to 2,189.34, 3,281.91 and 727.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.34 : 3,281.91 = 727.69 : x
2. Step 2: Convert to fraction form
   2,189.34/3,281.91 = 727.69/x
3. Step 3: Cross multiply
   2,189.34x = 3,281.91 × 727.69
4. Step 4: Simplify right side
   2,189.34x = 2,388,213.09
5. Step 5: Solve for x
   x = 2,388,213.09/2,189.34
6. Step 6: Final answer
   x = 1,090.84