Finding the Fourth Proportional to 2,021.67, 3,028.38 and 978.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.67 : 3,028.38 = 978.53 : x
2. Step 2: Convert to fraction form
   2,021.67/3,028.38 = 978.53/x
3. Step 3: Cross multiply
   2,021.67x = 3,028.38 × 978.53
4. Step 4: Simplify right side
   2,021.67x = 2,963,345.54
5. Step 5: Solve for x
   x = 2,963,345.54/2,021.67
6. Step 6: Final answer
   x = 1,465.79