Finding the Fourth Proportional to 3,861.69, 5,789.46 and 1,668.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861.69 : 5,789.46 = 1,668.89 : x
2. Step 2: Convert to fraction form
   3,861.69/5,789.46 = 1,668.89/x
3. Step 3: Cross multiply
   3,861.69x = 5,789.46 × 1,668.89
4. Step 4: Simplify right side
   3,861.69x = 9,661,942.95
5. Step 5: Solve for x
   x = 9,661,942.95/3,861.69
6. Step 6: Final answer
   x = 2,502.00