Finding the Fourth Proportional to 5,211.36, 7,192.23 and 3,222.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,211.36 : 7,192.23 = 3,222.15 : x
2. Step 2: Convert to fraction form
   5,211.36/7,192.23 = 3,222.15/x
3. Step 3: Cross multiply
   5,211.36x = 7,192.23 × 3,222.15
4. Step 4: Simplify right side
   5,211.36x = 23,174,443.89
5. Step 5: Solve for x
   x = 23,174,443.89/5,211.36
6. Step 6: Final answer
   x = 4,446.91