Finding the Fourth Proportional to 1,003.10, 1,504.24 and 386.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.10 : 1,504.24 = 386.83 : x
2. Step 2: Convert to fraction form
   1,003.10/1,504.24 = 386.83/x
3. Step 3: Cross multiply
   1,003.10x = 1,504.24 × 386.83
4. Step 4: Simplify right side
   1,003.10x = 581,885.16
5. Step 5: Solve for x
   x = 581,885.16/1,003.10
6. Step 6: Final answer
   x = 580.09