Finding the Fourth Proportional to 2,486.78, 3,431.82 and 1,367.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,486.78 : 3,431.82 = 1,367.82 : x
2. Step 2: Convert to fraction form
   2,486.78/3,431.82 = 1,367.82/x
3. Step 3: Cross multiply
   2,486.78x = 3,431.82 × 1,367.82
4. Step 4: Simplify right side
   2,486.78x = 4,694,109.47
5. Step 5: Solve for x
   x = 4,694,109.47/2,486.78
6. Step 6: Final answer
   x = 1,887.62