Finding the Fourth Proportional to 3,443.49, 5,165.43 and 978.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.49 : 5,165.43 = 978.11 : x
2. Step 2: Convert to fraction form
   3,443.49/5,165.43 = 978.11/x
3. Step 3: Cross multiply
   3,443.49x = 5,165.43 × 978.11
4. Step 4: Simplify right side
   3,443.49x = 5,052,358.74
5. Step 5: Solve for x
   x = 5,052,358.74/3,443.49
6. Step 6: Final answer
   x = 1,467.22