Finding the Fourth Proportional to 7,209.76, 9,949.52 and 4,225.64

Step by Step Solution

1. Step 1: Write the proportion equation
   7,209.76 : 9,949.52 = 4,225.64 : x
2. Step 2: Convert to fraction form
   7,209.76/9,949.52 = 4,225.64/x
3. Step 3: Cross multiply
   7,209.76x = 9,949.52 × 4,225.64
4. Step 4: Simplify right side
   7,209.76x = 42,043,089.69
5. Step 5: Solve for x
   x = 42,043,089.69/7,209.76
6. Step 6: Final answer
   x = 5,831.41