Finding the Fourth Proportional to 2,861.28, 4,293.72 and 1,217.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,861.28 : 4,293.72 = 1,217.82 : x
2. Step 2: Convert to fraction form
   2,861.28/4,293.72 = 1,217.82/x
3. Step 3: Cross multiply
   2,861.28x = 4,293.72 × 1,217.82
4. Step 4: Simplify right side
   2,861.28x = 5,228,978.09
5. Step 5: Solve for x
   x = 5,228,978.09/2,861.28
6. Step 6: Final answer
   x = 1,827.50