Finding the Fourth Proportional to 2,711.24, 4,063.61 and 978.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,711.24 : 4,063.61 = 978.92 : x
2. Step 2: Convert to fraction form
   2,711.24/4,063.61 = 978.92/x
3. Step 3: Cross multiply
   2,711.24x = 4,063.61 × 978.92
4. Step 4: Simplify right side
   2,711.24x = 3,977,923.89
5. Step 5: Solve for x
   x = 3,977,923.89/2,711.24
6. Step 6: Final answer
   x = 1,467.20