Finding the Fourth Proportional to 2,521.53, 3,782.69 and 672.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.53 : 3,782.69 = 672.80 : x
2. Step 2: Convert to fraction form
   2,521.53/3,782.69 = 672.80/x
3. Step 3: Cross multiply
   2,521.53x = 3,782.69 × 672.80
4. Step 4: Simplify right side
   2,521.53x = 2,544,971.55
5. Step 5: Solve for x
   x = 2,544,971.55/2,521.53
6. Step 6: Final answer
   x = 1,009.30