Finding the Fourth Proportional to 2,452.10, 3,678.10 and 720.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,452.10 : 3,678.10 = 720.72 : x
2. Step 2: Convert to fraction form
   2,452.10/3,678.10 = 720.72/x
3. Step 3: Cross multiply
   2,452.10x = 3,678.10 × 720.72
4. Step 4: Simplify right side
   2,452.10x = 2,650,878.43
5. Step 5: Solve for x
   x = 2,650,878.43/2,452.10
6. Step 6: Final answer
   x = 1,081.07