Finding the Fourth Proportional to 2,648.22, 3,972.28 and 673.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.22 : 3,972.28 = 673.86 : x
2. Step 2: Convert to fraction form
   2,648.22/3,972.28 = 673.86/x
3. Step 3: Cross multiply
   2,648.22x = 3,972.28 × 673.86
4. Step 4: Simplify right side
   2,648.22x = 2,676,760.60
5. Step 5: Solve for x
   x = 2,676,760.60/2,648.22
6. Step 6: Final answer
   x = 1,010.78