Finding the Fourth Proportional to 3,960.16, 5,938.23 and 1,326.73

Step by Step Solution

1. Step 1: Write the proportion equation
   3,960.16 : 5,938.23 = 1,326.73 : x
2. Step 2: Convert to fraction form
   3,960.16/5,938.23 = 1,326.73/x
3. Step 3: Cross multiply
   3,960.16x = 5,938.23 × 1,326.73
4. Step 4: Simplify right side
   3,960.16x = 7,878,427.89
5. Step 5: Solve for x
   x = 7,878,427.89/3,960.16
6. Step 6: Final answer
   x = 1,989.42