Finding the Fourth Proportional to 2,630.24, 3,938.88 and 2,116.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.24 : 3,938.88 = 2,116.16 : x
2. Step 2: Convert to fraction form
   2,630.24/3,938.88 = 2,116.16/x
3. Step 3: Cross multiply
   2,630.24x = 3,938.88 × 2,116.16
4. Step 4: Simplify right side
   2,630.24x = 8,335,300.30
5. Step 5: Solve for x
   x = 8,335,300.30/2,630.24
6. Step 6: Final answer
   x = 3,169.03