Finding the Fourth Proportional to 1,689.38, 2,329.89 and 1,099.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.38 : 2,329.89 = 1,099.70 : x
2. Step 2: Convert to fraction form
   1,689.38/2,329.89 = 1,099.70/x
3. Step 3: Cross multiply
   1,689.38x = 2,329.89 × 1,099.70
4. Step 4: Simplify right side
   1,689.38x = 2,562,180.03
5. Step 5: Solve for x
   x = 2,562,180.03/1,689.38
6. Step 6: Final answer
   x = 1,516.64