Finding the Fourth Proportional to 5,214.72, 7,196.42 and 2,856.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,214.72 : 7,196.42 = 2,856.72 : x
2. Step 2: Convert to fraction form
   5,214.72/7,196.42 = 2,856.72/x
3. Step 3: Cross multiply
   5,214.72x = 7,196.42 × 2,856.72
4. Step 4: Simplify right side
   5,214.72x = 20,558,156.94
5. Step 5: Solve for x
   x = 20,558,156.94/5,214.72
6. Step 6: Final answer
   x = 3,942.33