Finding the Fourth Proportional to 1,057.53, 1,585.88 and 472.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.53 : 1,585.88 = 472.71 : x
2. Step 2: Convert to fraction form
   1,057.53/1,585.88 = 472.71/x
3. Step 3: Cross multiply
   1,057.53x = 1,585.88 × 472.71
4. Step 4: Simplify right side
   1,057.53x = 749,661.33
5. Step 5: Solve for x
   x = 749,661.33/1,057.53
6. Step 6: Final answer
   x = 708.88