Finding the Fourth Proportional to 2,861.99, 4,291.31 and 1,217.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,861.99 : 4,291.31 = 1,217.69 : x
2. Step 2: Convert to fraction form
   2,861.99/4,291.31 = 1,217.69/x
3. Step 3: Cross multiply
   2,861.99x = 4,291.31 × 1,217.69
4. Step 4: Simplify right side
   2,861.99x = 5,225,457.73
5. Step 5: Solve for x
   x = 5,225,457.73/2,861.99
6. Step 6: Final answer
   x = 1,825.82