Finding the Fourth Proportional to 2,709.70, 4,065.16 and 978.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,709.70 : 4,065.16 = 978.33 : x
2. Step 2: Convert to fraction form
   2,709.70/4,065.16 = 978.33/x
3. Step 3: Cross multiply
   2,709.70x = 4,065.16 × 978.33
4. Step 4: Simplify right side
   2,709.70x = 3,977,062.50
5. Step 5: Solve for x
   x = 3,977,062.50/2,709.70
6. Step 6: Final answer
   x = 1,467.71