Finding the Fourth Proportional to 2,710.56, 4,064.04 and 978.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,710.56 : 4,064.04 = 978.96 : x
2. Step 2: Convert to fraction form
   2,710.56/4,064.04 = 978.96/x
3. Step 3: Cross multiply
   2,710.56x = 4,064.04 × 978.96
4. Step 4: Simplify right side
   2,710.56x = 3,978,532.60
5. Step 5: Solve for x
   x = 3,978,532.60/2,710.56
6. Step 6: Final answer
   x = 1,467.79