Finding the Fourth Proportional to 2,018.84, 3,028.61 and 923.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.84 : 3,028.61 = 923.31 : x
2. Step 2: Convert to fraction form
   2,018.84/3,028.61 = 923.31/x
3. Step 3: Cross multiply
   2,018.84x = 3,028.61 × 923.31
4. Step 4: Simplify right side
   2,018.84x = 2,796,345.90
5. Step 5: Solve for x
   x = 2,796,345.90/2,018.84
6. Step 6: Final answer
   x = 1,385.13