Finding the Fourth Proportional to 2,217.43, 3,059.89 and 1,285.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.43 : 3,059.89 = 1,285.75 : x
2. Step 2: Convert to fraction form
   2,217.43/3,059.89 = 1,285.75/x
3. Step 3: Cross multiply
   2,217.43x = 3,059.89 × 1,285.75
4. Step 4: Simplify right side
   2,217.43x = 3,934,253.57
5. Step 5: Solve for x
   x = 3,934,253.57/2,217.43
6. Step 6: Final answer
   x = 1,774.24