Finding the Fourth Proportional to 1,020.43, 1,530.32 and 435.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.43 : 1,530.32 = 435.42 : x
2. Step 2: Convert to fraction form
   1,020.43/1,530.32 = 435.42/x
3. Step 3: Cross multiply
   1,020.43x = 1,530.32 × 435.42
4. Step 4: Simplify right side
   1,020.43x = 666,331.93
5. Step 5: Solve for x
   x = 666,331.93/1,020.43
6. Step 6: Final answer
   x = 652.99