Finding the Fourth Proportional to 2,240.09, 3,356.37 and 1,128.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.09 : 3,356.37 = 1,128.03 : x
2. Step 2: Convert to fraction form
   2,240.09/3,356.37 = 1,128.03/x
3. Step 3: Cross multiply
   2,240.09x = 3,356.37 × 1,128.03
4. Step 4: Simplify right side
   2,240.09x = 3,786,073.46
5. Step 5: Solve for x
   x = 3,786,073.46/2,240.09
6. Step 6: Final answer
   x = 1,690.14