Finding the Fourth Proportional to 1,004.96, 1,506.90 and 388.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.96 : 1,506.90 = 388.82 : x
2. Step 2: Convert to fraction form
   1,004.96/1,506.90 = 388.82/x
3. Step 3: Cross multiply
   1,004.96x = 1,506.90 × 388.82
4. Step 4: Simplify right side
   1,004.96x = 585,912.86
5. Step 5: Solve for x
   x = 585,912.86/1,004.96
6. Step 6: Final answer
   x = 583.02