Finding the Fourth Proportional to 2,081.34, 2,871.28 and 1,284.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.34 : 2,871.28 = 1,284.00 : x
2. Step 2: Convert to fraction form
   2,081.34/2,871.28 = 1,284.00/x
3. Step 3: Cross multiply
   2,081.34x = 2,871.28 × 1,284.00
4. Step 4: Simplify right side
   2,081.34x = 3,686,709.16
5. Step 5: Solve for x
   x = 3,686,709.16/2,081.34
6. Step 6: Final answer
   x = 1,771.32