Finding the Fourth Proportional to 1,019.81, 1,529.42 and 394.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.81 : 1,529.42 = 394.96 : x
2. Step 2: Convert to fraction form
   1,019.81/1,529.42 = 394.96/x
3. Step 3: Cross multiply
   1,019.81x = 1,529.42 × 394.96
4. Step 4: Simplify right side
   1,019.81x = 604,059.72
5. Step 5: Solve for x
   x = 604,059.72/1,019.81
6. Step 6: Final answer
   x = 592.33