Finding the Fourth Proportional to 2,354.78, 3,530.04 and 1,120.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,354.78 : 3,530.04 = 1,120.94 : x
2. Step 2: Convert to fraction form
   2,354.78/3,530.04 = 1,120.94/x
3. Step 3: Cross multiply
   2,354.78x = 3,530.04 × 1,120.94
4. Step 4: Simplify right side
   2,354.78x = 3,956,963.04
5. Step 5: Solve for x
   x = 3,956,963.04/2,354.78
6. Step 6: Final answer
   x = 1,680.40