Finding the Fourth Proportional to 7,222.77, 9,967.15 and 4,078.96

Step by Step Solution

1. Step 1: Write the proportion equation
   7,222.77 : 9,967.15 = 4,078.96 : x
2. Step 2: Convert to fraction form
   7,222.77/9,967.15 = 4,078.96/x
3. Step 3: Cross multiply
   7,222.77x = 9,967.15 × 4,078.96
4. Step 4: Simplify right side
   7,222.77x = 40,655,586.34
5. Step 5: Solve for x
   x = 40,655,586.34/7,222.77
6. Step 6: Final answer
   x = 5,628.81