Finding the Fourth Proportional to 3,443.68, 5,165.79 and 978.73

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.68 : 5,165.79 = 978.73 : x
2. Step 2: Convert to fraction form
   3,443.68/5,165.79 = 978.73/x
3. Step 3: Cross multiply
   3,443.68x = 5,165.79 × 978.73
4. Step 4: Simplify right side
   3,443.68x = 5,055,913.65
5. Step 5: Solve for x
   x = 5,055,913.65/3,443.68
6. Step 6: Final answer
   x = 1,468.17