Finding the Fourth Proportional to 2,622.72, 3,933.64 and 674.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.72 : 3,933.64 = 674.80 : x
2. Step 2: Convert to fraction form
   2,622.72/3,933.64 = 674.80/x
3. Step 3: Cross multiply
   2,622.72x = 3,933.64 × 674.80
4. Step 4: Simplify right side
   2,622.72x = 2,654,420.27
5. Step 5: Solve for x
   x = 2,654,420.27/2,622.72
6. Step 6: Final answer
   x = 1,012.09