Finding the Fourth Proportional to 7,218.21, 9,960.72 and 4,233.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,218.21 : 9,960.72 = 4,233.82 : x
2. Step 2: Convert to fraction form
   7,218.21/9,960.72 = 4,233.82/x
3. Step 3: Cross multiply
   7,218.21x = 9,960.72 × 4,233.82
4. Step 4: Simplify right side
   7,218.21x = 42,171,897.26
5. Step 5: Solve for x
   x = 42,171,897.26/7,218.21
6. Step 6: Final answer
   x = 5,842.43