Finding the Fourth Proportional to 2,059.35, 3,086.81 and 889.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,059.35 : 3,086.81 = 889.90 : x
2. Step 2: Convert to fraction form
   2,059.35/3,086.81 = 889.90/x
3. Step 3: Cross multiply
   2,059.35x = 3,086.81 × 889.90
4. Step 4: Simplify right side
   2,059.35x = 2,746,947.77
5. Step 5: Solve for x
   x = 2,746,947.77/2,059.35
6. Step 6: Final answer
   x = 1,333.89