Finding the Fourth Proportional to 1,284.41, 1,771.91 and 1,018.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,284.41 : 1,771.91 = 1,018.96 : x
2. Step 2: Convert to fraction form
   1,284.41/1,771.91 = 1,018.96/x
3. Step 3: Cross multiply
   1,284.41x = 1,771.91 × 1,018.96
4. Step 4: Simplify right side
   1,284.41x = 1,805,496.55
5. Step 5: Solve for x
   x = 1,805,496.55/1,284.41
6. Step 6: Final answer
   x = 1,405.70