Finding the Fourth Proportional to 10,223.94, 15,328.54 and 3,978.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,223.94 : 15,328.54 = 3,978.69 : x
2. Step 2: Convert to fraction form
   10,223.94/15,328.54 = 3,978.69/x
3. Step 3: Cross multiply
   10,223.94x = 15,328.54 × 3,978.69
4. Step 4: Simplify right side
   10,223.94x = 60,987,456.30
5. Step 5: Solve for x
   x = 60,987,456.30/10,223.94
6. Step 6: Final answer
   x = 5,965.16