Finding the Fourth Proportional to 2,486.77, 3,431.72 and 1,367.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,486.77 : 3,431.72 = 1,367.69 : x
2. Step 2: Convert to fraction form
   2,486.77/3,431.72 = 1,367.69/x
3. Step 3: Cross multiply
   2,486.77x = 3,431.72 × 1,367.69
4. Step 4: Simplify right side
   2,486.77x = 4,693,515.39
5. Step 5: Solve for x
   x = 4,693,515.39/2,486.77
6. Step 6: Final answer
   x = 1,887.40