Finding the Fourth Proportional to 5,456.92, 8,196.72 and 5,311.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,456.92 : 8,196.72 = 5,311.12 : x
2. Step 2: Convert to fraction form
   5,456.92/8,196.72 = 5,311.12/x
3. Step 3: Cross multiply
   5,456.92x = 8,196.72 × 5,311.12
4. Step 4: Simplify right side
   5,456.92x = 43,533,763.53
5. Step 5: Solve for x
   x = 43,533,763.53/5,456.92
6. Step 6: Final answer
   x = 7,977.72