Finding the Fourth Proportional to 2,578.82, 3,868.22 and 631.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.82 : 3,868.22 = 631.02 : x
2. Step 2: Convert to fraction form
   2,578.82/3,868.22 = 631.02/x
3. Step 3: Cross multiply
   2,578.82x = 3,868.22 × 631.02
4. Step 4: Simplify right side
   2,578.82x = 2,440,940.27
5. Step 5: Solve for x
   x = 2,440,940.27/2,578.82
6. Step 6: Final answer
   x = 946.53