Finding the Fourth Proportional to 7,196.72, 10,800.60 and 2,815.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,196.72 : 10,800.60 = 2,815.28 : x
2. Step 2: Convert to fraction form
   7,196.72/10,800.60 = 2,815.28/x
3. Step 3: Cross multiply
   7,196.72x = 10,800.60 × 2,815.28
4. Step 4: Simplify right side
   7,196.72x = 30,406,713.17
5. Step 5: Solve for x
   x = 30,406,713.17/7,196.72
6. Step 6: Final answer
   x = 4,225.08