Finding the Fourth Proportional to 1,003.33, 1,384.38 and 630.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.33 : 1,384.38 = 630.39 : x
2. Step 2: Convert to fraction form
   1,003.33/1,384.38 = 630.39/x
3. Step 3: Cross multiply
   1,003.33x = 1,384.38 × 630.39
4. Step 4: Simplify right side
   1,003.33x = 872,699.31
5. Step 5: Solve for x
   x = 872,699.31/1,003.33
6. Step 6: Final answer
   x = 869.81