Finding the Fourth Proportional to 7,221.12, 9,959.67 and 5,238.24

Step by Step Solution

1. Step 1: Write the proportion equation
   7,221.12 : 9,959.67 = 5,238.24 : x
2. Step 2: Convert to fraction form
   7,221.12/9,959.67 = 5,238.24/x
3. Step 3: Cross multiply
   7,221.12x = 9,959.67 × 5,238.24
4. Step 4: Simplify right side
   7,221.12x = 52,171,141.78
5. Step 5: Solve for x
   x = 52,171,141.78/7,221.12
6. Step 6: Final answer
   x = 7,224.80