Finding the Fourth Proportional to 5,215, 7,196.16 and 2,976.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,215 : 7,196.16 = 2,976.88 : x
2. Step 2: Convert to fraction form
   5,215/7,196.16 = 2,976.88/x
3. Step 3: Cross multiply
   5,215x = 7,196.16 × 2,976.88
4. Step 4: Simplify right side
   5,215x = 21,422,104.78
5. Step 5: Solve for x
   x = 21,422,104.78/5,215
6. Step 6: Final answer
   x = 4,107.79