Finding the Fourth Proportional to 2,331.98, 3,218.07 and 1,284.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,331.98 : 3,218.07 = 1,284.05 : x
2. Step 2: Convert to fraction form
   2,331.98/3,218.07 = 1,284.05/x
3. Step 3: Cross multiply
   2,331.98x = 3,218.07 × 1,284.05
4. Step 4: Simplify right side
   2,331.98x = 4,132,162.78
5. Step 5: Solve for x
   x = 4,132,162.78/2,331.98
6. Step 6: Final answer
   x = 1,771.95