Finding the Fourth Proportional to 2,615.51, 3,923.22 and 667.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.51 : 3,923.22 = 667.73 : x
2. Step 2: Convert to fraction form
   2,615.51/3,923.22 = 667.73/x
3. Step 3: Cross multiply
   2,615.51x = 3,923.22 × 667.73
4. Step 4: Simplify right side
   2,615.51x = 2,619,651.69
5. Step 5: Solve for x
   x = 2,619,651.69/2,615.51
6. Step 6: Final answer
   x = 1,001.58