Finding the Fourth Proportional to 1,019.00, 1,528.20 and 394.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.00 : 1,528.20 = 394.15 : x
2. Step 2: Convert to fraction form
   1,019.00/1,528.20 = 394.15/x
3. Step 3: Cross multiply
   1,019.00x = 1,528.20 × 394.15
4. Step 4: Simplify right side
   1,019.00x = 602,337.69
5. Step 5: Solve for x
   x = 602,337.69/1,019.00
6. Step 6: Final answer
   x = 591.11