Finding the Fourth Proportional to 2,451.69, 3,382.47 and 1,389.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,451.69 : 3,382.47 = 1,389.33 : x
2. Step 2: Convert to fraction form
   2,451.69/3,382.47 = 1,389.33/x
3. Step 3: Cross multiply
   2,451.69x = 3,382.47 × 1,389.33
4. Step 4: Simplify right side
   2,451.69x = 4,699,367.05
5. Step 5: Solve for x
   x = 4,699,367.05/2,451.69
6. Step 6: Final answer
   x = 1,916.79