Finding the Fourth Proportional to 2,622.36, 3,933.46 and 978.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.36 : 3,933.46 = 978.24 : x
2. Step 2: Convert to fraction form
   2,622.36/3,933.46 = 978.24/x
3. Step 3: Cross multiply
   2,622.36x = 3,933.46 × 978.24
4. Step 4: Simplify right side
   2,622.36x = 3,847,867.91
5. Step 5: Solve for x
   x = 3,847,867.91/2,622.36
6. Step 6: Final answer
   x = 1,467.33