Finding the Fourth Proportional to 1,057.56, 1,585.41 and 570.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.56 : 1,585.41 = 570.06 : x
2. Step 2: Convert to fraction form
   1,057.56/1,585.41 = 570.06/x
3. Step 3: Cross multiply
   1,057.56x = 1,585.41 × 570.06
4. Step 4: Simplify right side
   1,057.56x = 903,778.82
5. Step 5: Solve for x
   x = 903,778.82/1,057.56
6. Step 6: Final answer
   x = 854.59