Finding the Fourth Proportional to 1,054.06, 1,581.31 and 395.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.06 : 1,581.31 = 395.83 : x
2. Step 2: Convert to fraction form
   1,054.06/1,581.31 = 395.83/x
3. Step 3: Cross multiply
   1,054.06x = 1,581.31 × 395.83
4. Step 4: Simplify right side
   1,054.06x = 625,932.41
5. Step 5: Solve for x
   x = 625,932.41/1,054.06
6. Step 6: Final answer
   x = 593.83