Finding the Fourth Proportional to 2,628.82, 3,943.20 and 985.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.82 : 3,943.20 = 985.33 : x
2. Step 2: Convert to fraction form
   2,628.82/3,943.20 = 985.33/x
3. Step 3: Cross multiply
   2,628.82x = 3,943.20 × 985.33
4. Step 4: Simplify right side
   2,628.82x = 3,885,353.26
5. Step 5: Solve for x
   x = 3,885,353.26/2,628.82
6. Step 6: Final answer
   x = 1,477.98