Finding the Fourth Proportional to 2,428.58, 3,642.57 and 673.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.58 : 3,642.57 = 673.72 : x
2. Step 2: Convert to fraction form
   2,428.58/3,642.57 = 673.72/x
3. Step 3: Cross multiply
   2,428.58x = 3,642.57 × 673.72
4. Step 4: Simplify right side
   2,428.58x = 2,454,063.15
5. Step 5: Solve for x
   x = 2,454,063.15/2,428.58
6. Step 6: Final answer
   x = 1,010.49