Finding the Fourth Proportional to 7,218.34, 9,960.59 and 4,031.37

Step by Step Solution

1. Step 1: Write the proportion equation
   7,218.34 : 9,960.59 = 4,031.37 : x
2. Step 2: Convert to fraction form
   7,218.34/9,960.59 = 4,031.37/x
3. Step 3: Cross multiply
   7,218.34x = 9,960.59 × 4,031.37
4. Step 4: Simplify right side
   7,218.34x = 40,154,856.02
5. Step 5: Solve for x
   x = 40,154,856.02/7,218.34
6. Step 6: Final answer
   x = 5,562.90