Finding the Fourth Proportional to 2,622.46, 3,933.48 and 978.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.46 : 3,933.48 = 978.94 : x
2. Step 2: Convert to fraction form
   2,622.46/3,933.48 = 978.94/x
3. Step 3: Cross multiply
   2,622.46x = 3,933.48 × 978.94
4. Step 4: Simplify right side
   2,622.46x = 3,850,640.91
5. Step 5: Solve for x
   x = 3,850,640.91/2,622.46
6. Step 6: Final answer
   x = 1,468.33