Finding the Fourth Proportional to 1,002.11, 1,383.01 and 629.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.11 : 1,383.01 = 629.37 : x
2. Step 2: Convert to fraction form
   1,002.11/1,383.01 = 629.37/x
3. Step 3: Cross multiply
   1,002.11x = 1,383.01 × 629.37
4. Step 4: Simplify right side
   1,002.11x = 870,423.43
5. Step 5: Solve for x
   x = 870,423.43/1,002.11
6. Step 6: Final answer
   x = 868.60