Finding the Fourth Proportional to 3,443.37, 5,165.12 and 978.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.37 : 5,165.12 = 978.20 : x
2. Step 2: Convert to fraction form
   3,443.37/5,165.12 = 978.20/x
3. Step 3: Cross multiply
   3,443.37x = 5,165.12 × 978.20
4. Step 4: Simplify right side
   3,443.37x = 5,052,520.38
5. Step 5: Solve for x
   x = 5,052,520.38/3,443.37
6. Step 6: Final answer
   x = 1,467.32