Finding the Fourth Proportional to 2,005.59, 3,008.88 and 689.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.59 : 3,008.88 = 689.37 : x
2. Step 2: Convert to fraction form
   2,005.59/3,008.88 = 689.37/x
3. Step 3: Cross multiply
   2,005.59x = 3,008.88 × 689.37
4. Step 4: Simplify right side
   2,005.59x = 2,074,216.56
5. Step 5: Solve for x
   x = 2,074,216.56/2,005.59
6. Step 6: Final answer
   x = 1,034.22