Finding the Fourth Proportional to 1,020.40, 1,530.59 and 655.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.40 : 1,530.59 = 655.42 : x
2. Step 2: Convert to fraction form
   1,020.40/1,530.59 = 655.42/x
3. Step 3: Cross multiply
   1,020.40x = 1,530.59 × 655.42
4. Step 4: Simplify right side
   1,020.40x = 1,003,179.30
5. Step 5: Solve for x
   x = 1,003,179.30/1,020.40
6. Step 6: Final answer
   x = 983.12