Finding the Fourth Proportional to 2,486.72, 3,431.90 and 1,424.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,486.72 : 3,431.90 = 1,424.83 : x
2. Step 2: Convert to fraction form
   2,486.72/3,431.90 = 1,424.83/x
3. Step 3: Cross multiply
   2,486.72x = 3,431.90 × 1,424.83
4. Step 4: Simplify right side
   2,486.72x = 4,889,858.37
5. Step 5: Solve for x
   x = 4,889,858.37/2,486.72
6. Step 6: Final answer
   x = 1,966.39