Finding the Fourth Proportional to 2,622.08, 3,931.68 and 978.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.08 : 3,931.68 = 978.32 : x
2. Step 2: Convert to fraction form
   2,622.08/3,931.68 = 978.32/x
3. Step 3: Cross multiply
   2,622.08x = 3,931.68 × 978.32
4. Step 4: Simplify right side
   2,622.08x = 3,846,441.18
5. Step 5: Solve for x
   x = 3,846,441.18/2,622.08
6. Step 6: Final answer
   x = 1,466.94