Finding the Fourth Proportional to 7,200.24, 10,785.20 and 3,307.92

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.24 : 10,785.20 = 3,307.92 : x
2. Step 2: Convert to fraction form
   7,200.24/10,785.20 = 3,307.92/x
3. Step 3: Cross multiply
   7,200.24x = 10,785.20 × 3,307.92
4. Step 4: Simplify right side
   7,200.24x = 35,676,578.78
5. Step 5: Solve for x
   x = 35,676,578.78/7,200.24
6. Step 6: Final answer
   x = 4,954.92