Finding the Fourth Proportional to 2,308.38, 3,459.45 and 1,689.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.38 : 3,459.45 = 1,689.18 : x
2. Step 2: Convert to fraction form
   2,308.38/3,459.45 = 1,689.18/x
3. Step 3: Cross multiply
   2,308.38x = 3,459.45 × 1,689.18
4. Step 4: Simplify right side
   2,308.38x = 5,843,633.75
5. Step 5: Solve for x
   x = 5,843,633.75/2,308.38
6. Step 6: Final answer
   x = 2,531.49