Finding the Fourth Proportional to 1,002.88, 1,383.53 and 630.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.88 : 1,383.53 = 630.08 : x
2. Step 2: Convert to fraction form
   1,002.88/1,383.53 = 630.08/x
3. Step 3: Cross multiply
   1,002.88x = 1,383.53 × 630.08
4. Step 4: Simplify right side
   1,002.88x = 871,733.25
5. Step 5: Solve for x
   x = 871,733.25/1,002.88
6. Step 6: Final answer
   x = 869.23