Finding the Fourth Proportional to 2,488.70, 3,434.28 and 1,369.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.70 : 3,434.28 = 1,369.69 : x
2. Step 2: Convert to fraction form
   2,488.70/3,434.28 = 1,369.69/x
3. Step 3: Cross multiply
   2,488.70x = 3,434.28 × 1,369.69
4. Step 4: Simplify right side
   2,488.70x = 4,703,874.95
5. Step 5: Solve for x
   x = 4,703,874.95/2,488.70
6. Step 6: Final answer
   x = 1,890.09