Finding the Fourth Proportional to 2,361.48, 3,539.72 and 1,128.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,361.48 : 3,539.72 = 1,128.28 : x
2. Step 2: Convert to fraction form
   2,361.48/3,539.72 = 1,128.28/x
3. Step 3: Cross multiply
   2,361.48x = 3,539.72 × 1,128.28
4. Step 4: Simplify right side
   2,361.48x = 3,993,795.28
5. Step 5: Solve for x
   x = 3,993,795.28/2,361.48
6. Step 6: Final answer
   x = 1,691.23