Finding the Fourth Proportional to 2,709.69, 4,064.67 and 978.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,709.69 : 4,064.67 = 978.27 : x
2. Step 2: Convert to fraction form
   2,709.69/4,064.67 = 978.27/x
3. Step 3: Cross multiply
   2,709.69x = 4,064.67 × 978.27
4. Step 4: Simplify right side
   2,709.69x = 3,976,344.72
5. Step 5: Solve for x
   x = 3,976,344.72/2,709.69
6. Step 6: Final answer
   x = 1,467.45