Finding the Fourth Proportional to 7,222.80, 9,956.52 and 5,648.16

Step by Step Solution

1. Step 1: Write the proportion equation
   7,222.80 : 9,956.52 = 5,648.16 : x
2. Step 2: Convert to fraction form
   7,222.80/9,956.52 = 5,648.16/x
3. Step 3: Cross multiply
   7,222.80x = 9,956.52 × 5,648.16
4. Step 4: Simplify right side
   7,222.80x = 56,236,018.00
5. Step 5: Solve for x
   x = 56,236,018.00/7,222.80
6. Step 6: Final answer
   x = 7,785.90