Finding the Fourth Proportional to 2,188.34, 3,281.79 and 727.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.34 : 3,281.79 = 727.10 : x
2. Step 2: Convert to fraction form
   2,188.34/3,281.79 = 727.10/x
3. Step 3: Cross multiply
   2,188.34x = 3,281.79 × 727.10
4. Step 4: Simplify right side
   2,188.34x = 2,386,173.10
5. Step 5: Solve for x
   x = 2,386,173.10/2,188.34
6. Step 6: Final answer
   x = 1,090.41