Finding the Fourth Proportional to 3,169.28, 4,754.69 and 978.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,169.28 : 4,754.69 = 978.05 : x
2. Step 2: Convert to fraction form
   3,169.28/4,754.69 = 978.05/x
3. Step 3: Cross multiply
   3,169.28x = 4,754.69 × 978.05
4. Step 4: Simplify right side
   3,169.28x = 4,650,295.89
5. Step 5: Solve for x
   x = 4,650,295.89/3,169.28
6. Step 6: Final answer
   x = 1,467.31