Finding the Fourth Proportional to 2,406.78, 3,609.90 and 1,020.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.78 : 3,609.90 = 1,020.33 : x
2. Step 2: Convert to fraction form
   2,406.78/3,609.90 = 1,020.33/x
3. Step 3: Cross multiply
   2,406.78x = 3,609.90 × 1,020.33
4. Step 4: Simplify right side
   2,406.78x = 3,683,289.27
5. Step 5: Solve for x
   x = 3,683,289.27/2,406.78
6. Step 6: Final answer
   x = 1,530.38