Finding the Fourth Proportional to 1,073.31, 1,608.55 and 488.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,073.31 : 1,608.55 = 488.39 : x
2. Step 2: Convert to fraction form
   1,073.31/1,608.55 = 488.39/x
3. Step 3: Cross multiply
   1,073.31x = 1,608.55 × 488.39
4. Step 4: Simplify right side
   1,073.31x = 785,605.28
5. Step 5: Solve for x
   x = 785,605.28/1,073.31
6. Step 6: Final answer
   x = 731.94