Finding the Fourth Proportional to 2,826.38, 4,240.48 and 978.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826.38 : 4,240.48 = 978.67 : x
2. Step 2: Convert to fraction form
   2,826.38/4,240.48 = 978.67/x
3. Step 3: Cross multiply
   2,826.38x = 4,240.48 × 978.67
4. Step 4: Simplify right side
   2,826.38x = 4,150,030.56
5. Step 5: Solve for x
   x = 4,150,030.56/2,826.38
6. Step 6: Final answer
   x = 1,468.32