Finding the Fourth Proportional to 2,398.31, 3,309.69 and 1,403.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,398.31 : 3,309.69 = 1,403.39 : x
2. Step 2: Convert to fraction form
   2,398.31/3,309.69 = 1,403.39/x
3. Step 3: Cross multiply
   2,398.31x = 3,309.69 × 1,403.39
4. Step 4: Simplify right side
   2,398.31x = 4,644,769.30
5. Step 5: Solve for x
   x = 4,644,769.30/2,398.31
6. Step 6: Final answer
   x = 1,936.69