Finding the Fourth Proportional to 2,439.06, 3,659.05 and 978.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.06 : 3,659.05 = 978.33 : x
2. Step 2: Convert to fraction form
   2,439.06/3,659.05 = 978.33/x
3. Step 3: Cross multiply
   2,439.06x = 3,659.05 × 978.33
4. Step 4: Simplify right side
   2,439.06x = 3,579,758.39
5. Step 5: Solve for x
   x = 3,579,758.39/2,439.06
6. Step 6: Final answer
   x = 1,467.68