Finding the Fourth Proportional to 2,189.96, 3,287.18 and 1,708.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.96 : 3,287.18 = 1,708.28 : x
2. Step 2: Convert to fraction form
   2,189.96/3,287.18 = 1,708.28/x
3. Step 3: Cross multiply
   2,189.96x = 3,287.18 × 1,708.28
4. Step 4: Simplify right side
   2,189.96x = 5,615,423.85
5. Step 5: Solve for x
   x = 5,615,423.85/2,189.96
6. Step 6: Final answer
   x = 2,564.17