Finding the Fourth Proportional to 1,003.17, 1,383.96 and 630.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.17 : 1,383.96 = 630.03 : x
2. Step 2: Convert to fraction form
   1,003.17/1,383.96 = 630.03/x
3. Step 3: Cross multiply
   1,003.17x = 1,383.96 × 630.03
4. Step 4: Simplify right side
   1,003.17x = 871,936.32
5. Step 5: Solve for x
   x = 871,936.32/1,003.17
6. Step 6: Final answer
   x = 869.18