Finding the Fourth Proportional to 1,019.33, 1,528.61 and 433.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.33 : 1,528.61 = 433.96 : x
2. Step 2: Convert to fraction form
   1,019.33/1,528.61 = 433.96/x
3. Step 3: Cross multiply
   1,019.33x = 1,528.61 × 433.96
4. Step 4: Simplify right side
   1,019.33x = 663,358.33
5. Step 5: Solve for x
   x = 663,358.33/1,019.33
6. Step 6: Final answer
   x = 650.78