Finding the Fourth Proportional to 2,081.77, 2,869.86 and 1,284.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.77 : 2,869.86 = 1,284.56 : x
2. Step 2: Convert to fraction form
   2,081.77/2,869.86 = 1,284.56/x
3. Step 3: Cross multiply
   2,081.77x = 2,869.86 × 1,284.56
4. Step 4: Simplify right side
   2,081.77x = 3,686,486.59
5. Step 5: Solve for x
   x = 3,686,486.59/2,081.77
6. Step 6: Final answer
   x = 1,770.85