Finding the Fourth Proportional to 1,019.00, 1,528.56 and 288.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.00 : 1,528.56 = 288.51 : x
2. Step 2: Convert to fraction form
   1,019.00/1,528.56 = 288.51/x
3. Step 3: Cross multiply
   1,019.00x = 1,528.56 × 288.51
4. Step 4: Simplify right side
   1,019.00x = 441,004.85
5. Step 5: Solve for x
   x = 441,004.85/1,019.00
6. Step 6: Final answer
   x = 432.78