Finding the Fourth Proportional to 3,057.91, 4,587.89 and 1,209.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,057.91 : 4,587.89 = 1,209.89 : x
2. Step 2: Convert to fraction form
   3,057.91/4,587.89 = 1,209.89/x
3. Step 3: Cross multiply
   3,057.91x = 4,587.89 × 1,209.89
4. Step 4: Simplify right side
   3,057.91x = 5,550,847.65
5. Step 5: Solve for x
   x = 5,550,847.65/3,057.91
6. Step 6: Final answer
   x = 1,815.24