Finding the Fourth Proportional to 2,709.93, 4,064.91 and 978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,709.93 : 4,064.91 = 978.56 : x
2. Step 2: Convert to fraction form
   2,709.93/4,064.91 = 978.56/x
3. Step 3: Cross multiply
   2,709.93x = 4,064.91 × 978.56
4. Step 4: Simplify right side
   2,709.93x = 3,977,758.33
5. Step 5: Solve for x
   x = 3,977,758.33/2,709.93
6. Step 6: Final answer
   x = 1,467.85