Finding the Fourth Proportional to 3,443.78, 5,165.46 and 978.26

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.78 : 5,165.46 = 978.26 : x
2. Step 2: Convert to fraction form
   3,443.78/5,165.46 = 978.26/x
3. Step 3: Cross multiply
   3,443.78x = 5,165.46 × 978.26
4. Step 4: Simplify right side
   3,443.78x = 5,053,162.90
5. Step 5: Solve for x
   x = 5,053,162.90/3,443.78
6. Step 6: Final answer
   x = 1,467.33