Finding the Fourth Proportional to 2,682.83, 4,018.71 and 1,990.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,682.83 : 4,018.71 = 1,990.28 : x
2. Step 2: Convert to fraction form
   2,682.83/4,018.71 = 1,990.28/x
3. Step 3: Cross multiply
   2,682.83x = 4,018.71 × 1,990.28
4. Step 4: Simplify right side
   2,682.83x = 7,998,358.14
5. Step 5: Solve for x
   x = 7,998,358.14/2,682.83
6. Step 6: Final answer
   x = 2,981.31