Finding the Fourth Proportional to 5,111.69, 7,662.07 and 2,644.03

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.69 : 7,662.07 = 2,644.03 : x
2. Step 2: Convert to fraction form
   5,111.69/7,662.07 = 2,644.03/x
3. Step 3: Cross multiply
   5,111.69x = 7,662.07 × 2,644.03
4. Step 4: Simplify right side
   5,111.69x = 20,258,691.41
5. Step 5: Solve for x
   x = 20,258,691.41/5,111.69
6. Step 6: Final answer
   x = 3,963.21