Finding the Fourth Proportional to 1,003.38, 1,505.16 and 570.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.38 : 1,505.16 = 570.12 : x
2. Step 2: Convert to fraction form
   1,003.38/1,505.16 = 570.12/x
3. Step 3: Cross multiply
   1,003.38x = 1,505.16 × 570.12
4. Step 4: Simplify right side
   1,003.38x = 858,121.82
5. Step 5: Solve for x
   x = 858,121.82/1,003.38
6. Step 6: Final answer
   x = 855.23