Finding the Fourth Proportional to 2,615.38, 3,923.12 and 667.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.38 : 3,923.12 = 667.62 : x
2. Step 2: Convert to fraction form
   2,615.38/3,923.12 = 667.62/x
3. Step 3: Cross multiply
   2,615.38x = 3,923.12 × 667.62
4. Step 4: Simplify right side
   2,615.38x = 2,619,153.37
5. Step 5: Solve for x
   x = 2,619,153.37/2,615.38
6. Step 6: Final answer
   x = 1,001.44