Finding the Fourth Proportional to 2,622.54, 3,932.01 and 978.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.54 : 3,932.01 = 978.21 : x
2. Step 2: Convert to fraction form
   2,622.54/3,932.01 = 978.21/x
3. Step 3: Cross multiply
   2,622.54x = 3,932.01 × 978.21
4. Step 4: Simplify right side
   2,622.54x = 3,846,331.50
5. Step 5: Solve for x
   x = 3,846,331.50/2,622.54
6. Step 6: Final answer
   x = 1,466.64