Finding the Fourth Proportional to 1,786.54, 2,680.83 and 1,057.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,786.54 : 2,680.83 = 1,057.54 : x
2. Step 2: Convert to fraction form
   1,786.54/2,680.83 = 1,057.54/x
3. Step 3: Cross multiply
   1,786.54x = 2,680.83 × 1,057.54
4. Step 4: Simplify right side
   1,786.54x = 2,835,084.96
5. Step 5: Solve for x
   x = 2,835,084.96/1,786.54
6. Step 6: Final answer
   x = 1,586.91