Finding the Fourth Proportional to 2,490.81, 3,736.20 and 1,028.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.81 : 3,736.20 = 1,028.34 : x
2. Step 2: Convert to fraction form
   2,490.81/3,736.20 = 1,028.34/x
3. Step 3: Cross multiply
   2,490.81x = 3,736.20 × 1,028.34
4. Step 4: Simplify right side
   2,490.81x = 3,842,083.91
5. Step 5: Solve for x
   x = 3,842,083.91/2,490.81
6. Step 6: Final answer
   x = 1,542.50