Finding the Fourth Proportional to 2,021.69, 3,028.28 and 926.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.69 : 3,028.28 = 926.98 : x
2. Step 2: Convert to fraction form
   2,021.69/3,028.28 = 926.98/x
3. Step 3: Cross multiply
   2,021.69x = 3,028.28 × 926.98
4. Step 4: Simplify right side
   2,021.69x = 2,807,142.79
5. Step 5: Solve for x
   x = 2,807,142.79/2,021.69
6. Step 6: Final answer
   x = 1,388.51