Finding the Fourth Proportional to 7,227.12, 9,972.72 and 4,243.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,227.12 : 9,972.72 = 4,243.69 : x
2. Step 2: Convert to fraction form
   7,227.12/9,972.72 = 4,243.69/x
3. Step 3: Cross multiply
   7,227.12x = 9,972.72 × 4,243.69
4. Step 4: Simplify right side
   7,227.12x = 42,321,144.60
5. Step 5: Solve for x
   x = 42,321,144.60/7,227.12
6. Step 6: Final answer
   x = 5,855.88