Finding the Fourth Proportional to 2,213.25, 3,321.49 and 1,785.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.25 : 3,321.49 = 1,785.57 : x
2. Step 2: Convert to fraction form
   2,213.25/3,321.49 = 1,785.57/x
3. Step 3: Cross multiply
   2,213.25x = 3,321.49 × 1,785.57
4. Step 4: Simplify right side
   2,213.25x = 5,930,752.90
5. Step 5: Solve for x
   x = 5,930,752.90/2,213.25
6. Step 6: Final answer
   x = 2,679.66