Finding the Fourth Proportional to 3,443.82, 5,165.60 and 978.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.82 : 5,165.60 = 978.63 : x
2. Step 2: Convert to fraction form
   3,443.82/5,165.60 = 978.63/x
3. Step 3: Cross multiply
   3,443.82x = 5,165.60 × 978.63
4. Step 4: Simplify right side
   3,443.82x = 5,055,206.23
5. Step 5: Solve for x
   x = 5,055,206.23/3,443.82
6. Step 6: Final answer
   x = 1,467.91