Finding the Fourth Proportional to 1,019.43, 1,528.82 and 434.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.43 : 1,528.82 = 434.42 : x
2. Step 2: Convert to fraction form
   1,019.43/1,528.82 = 434.42/x
3. Step 3: Cross multiply
   1,019.43x = 1,528.82 × 434.42
4. Step 4: Simplify right side
   1,019.43x = 664,149.98
5. Step 5: Solve for x
   x = 664,149.98/1,019.43
6. Step 6: Final answer
   x = 651.49