Finding the Fourth Proportional to 5,215.14, 7,196.61 and 2,856.84

Step by Step Solution

1. Step 1: Write the proportion equation
   5,215.14 : 7,196.61 = 2,856.84 : x
2. Step 2: Convert to fraction form
   5,215.14/7,196.61 = 2,856.84/x
3. Step 3: Cross multiply
   5,215.14x = 7,196.61 × 2,856.84
4. Step 4: Simplify right side
   5,215.14x = 20,559,563.31
5. Step 5: Solve for x
   x = 20,559,563.31/5,215.14
6. Step 6: Final answer
   x = 3,942.28