Finding the Fourth Proportional to 2,205.90, 3,310.18 and 889.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.90 : 3,310.18 = 889.94 : x
2. Step 2: Convert to fraction form
   2,205.90/3,310.18 = 889.94/x
3. Step 3: Cross multiply
   2,205.90x = 3,310.18 × 889.94
4. Step 4: Simplify right side
   2,205.90x = 2,945,861.59
5. Step 5: Solve for x
   x = 2,945,861.59/2,205.90
6. Step 6: Final answer
   x = 1,335.45