Finding the Fourth Proportional to 7,225.20, 9,966.72 and 4,240.47

Step by Step Solution

1. Step 1: Write the proportion equation
   7,225.20 : 9,966.72 = 4,240.47 : x
2. Step 2: Convert to fraction form
   7,225.20/9,966.72 = 4,240.47/x
3. Step 3: Cross multiply
   7,225.20x = 9,966.72 × 4,240.47
4. Step 4: Simplify right side
   7,225.20x = 42,263,577.16
5. Step 5: Solve for x
   x = 42,263,577.16/7,225.20
6. Step 6: Final answer
   x = 5,849.47