Finding the Fourth Proportional to 3,978.25, 5,960.26 and 2,658.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.25 : 5,960.26 = 2,658.01 : x
2. Step 2: Convert to fraction form
   3,978.25/5,960.26 = 2,658.01/x
3. Step 3: Cross multiply
   3,978.25x = 5,960.26 × 2,658.01
4. Step 4: Simplify right side
   3,978.25x = 15,842,430.28
5. Step 5: Solve for x
   x = 15,842,430.28/3,978.25
6. Step 6: Final answer
   x = 3,982.26